i installed this plugin, but after restarting service JIRA, i tryied to enable the plugin and i am getting this error:
This plugin failed to enable. Your license may be invalid. Please refer to the logs for more information.
JIRA 5.1.2, plugin version 1.3.1. Any ideas?

LOG:
2012-08-16 15:51:51,806 http-8080-6 ERROR pnovak 951x1411x1 1ulyarp 127.0.0.1 /rest/plugins/1.0/com.googlecode.jira-suite-utilities-key [atlassian.plugin.manager.DefaultPluginManager] There was an error loading the descriptor 'User Is In Any Groups' of plugin 'com.googlecode.jira-suite-utilities'. Disabling.
com.atlassian.plugin.PluginException: Cannot load condition class 'com.googlecode.jsu.workflow.condition.UserIsInAnyGroupsCondition'. com.googlecode.jsu.workflow.condition.UserIsInAnyGroupsCondition
at com.atlassian.jira.plugin.workflow.AbstractWorkflowModuleDescriptor.enabled(AbstractWorkflowModuleDescriptor.java:64)
at com.atlassian.multitenant.plugins.MultiTenantModuleDescriptorFactory$LifecycleInterceptor$3.run(MultiTenantModuleDescriptorFactory.java:258)
at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForTenant(DefaultMultiTenantManager.java:61)
at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForEachTenant(DefaultMultiTenantManager.java:52)
at com.atlassian.multitenant.plugins.MultiTenantModuleDescriptorFactory$LifecycleInterceptor.handleEnabled(MultiTenantModuleDescriptorFactory.java:251)
at com.atlassian.multitenant.plugins.MultiTenantModuleDescriptorFactory$LifecycleInterceptor.intercept(MultiTenantModuleDescriptorFactory.java:190)
at com.atlassian.jira.plugin.workflow.WorkflowConditionModuleDescriptor$$EnhancerByCGLIB$$29a8ed66.enabled(<generated>)
at com.atlassian.plugin.manager.DefaultPluginManager.notifyModuleEnabled(DefaultPluginManager.java:1474)
at com.atlassian.plugin.manager.DefaultPluginManager.enableConfiguredPluginModule(DefaultPluginManager.java:1277)
at com.atlassian.plugin.manager.DefaultPluginManager.enableConfiguredPluginModules(DefaultPluginManager.java:1243)
at com.atlassian.plugin.manager.DefaultPluginManager.notifyPluginEnabled(DefaultPluginManager.java:1221)
at com.atlassian.plugin.manager.DefaultPluginManager.enablePlugins(DefaultPluginManager.java:1193)
at com.atlassian.jira.plugin.JiraPluginManager.enablePlugins(JiraPluginManager.java:66) <+3> (NativeMethodAccessorImpl.java:39) (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:129)
at $Proxy501.enablePlugins(Unknown Source) <+3> (NativeMethodAccessorImpl.java:39) (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy1062.enablePlugins(Unknown Source)
at com.atlassian.upm.PluginAccessorAndControllerImpl$4.doInTransaction(PluginAccessorAndControllerImpl.java:356)
at com.atlassian.upm.PluginAccessorAndControllerImpl$4.doInTransaction(PluginAccessorAndControllerImpl.java:350)
at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
at com.atlassian.jira.DefaultHostContextAccessor.doInTransaction(DefaultHostContextAccessor.java:34) <+2> (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.atlassian.multitenant.impl.MultiTenantComponentFactoryImpl$AbstractMultiTenantAwareInvocationHandler.invokeInternal(MultiTenantComponentFactoryImpl.java:181)
at com.atlassian.multitenant.impl.MultiTenantComponentFactoryImpl$MultiTenantAwareInvocationHandler.invoke(MultiTenantComponentFactoryImpl.java:211)
at $Proxy348.doInTransaction(Unknown Source) <+2> (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:129)
at $Proxy348.doInTransaction(Unknown Source) <+2> (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:154)
at $Proxy348.doInTransaction(Unknown Source)
at com.atlassian.sal.core.transaction.HostContextTransactionTemplate.execute(HostContextTransactionTemplate.java:21) <+2> (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy1065.execute(Unknown Source)
at com.atlassian.upm.PluginAccessorAndControllerImpl.enablePlugin(PluginAccessorAndControllerImpl.java:349)
at com.atlassian.upm.rest.resources.PluginResource.put(PluginResource.java:124) <+3> (NativeMethodAccessorImpl.java:39) (DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597) <+18> (DispatchProviderHelper.java:234) (DispatchProviderHelper.java:100) (DefaultMethodInvocation.java:61) (ExpandInterceptor.java:38) (DefaultMethodInvocation.java:61) (DispatchProviderHelper.java:132) (DispatchProviderHelper.java:230) (ResourceJavaMethodDispatcher.java:75) (HttpMethodRule.java:288) (ResourceClassRule.java:108) (RightHandPathRule.java:147) (RootResourceClassesRule.java:84) (WebApplicationImpl.java:1469) (WebApplicationImpl.java:1400) (WebApplicationImpl.java:1349) (WebApplicationImpl.java:1339) (WebComponent.java:416) (ServletContainer.java:537)
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:178) <+1> (ServletContainer.java:795)
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:73) <+28> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (RestServletUtilsUpdaterFilter.java:26) (RestServletUtilsUpdaterFilter.java:40) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (ContextFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (AccessLogFilter.java:103) (AccessLogFilter.java:87) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (XsrfTokenAdditionRequestFilter.java:54) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
at com.atlassian.labs.remoteapps.modules.permissions.ApiScopingFilter.doFilter(ApiScopingFilter.java:71) <+22> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (SecurityFilter.java:234) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (TrustedApplicationsFilter.java:98) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (BaseLoginFilter.java:157) (JiraLoginFilter.java:70) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66) (OAuthFilter.java:71) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:40) <+18> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (AbstractJohnsonFilter.java:71) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (UrlRewriteFilter.java:738) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (GzipFilter.java:74) (GzipFilter.java:51) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
at com.atlassian.labs.remoteapps.modules.oauth.OAuth2LOFilter.doFilter(OAuth2LOFilter.java:70) <+47> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (JWDSendRedirectFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (ChainedFilterStepRunner.java:78) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (AbstractCachingFilter.java:33) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (AbstractEncodingFilter.java:41) (AbstractHttpFilter.java:31) (PathMatchingEncodingFilter.java:45) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (ActiveRequestsFilter.java:346) (ActiveRequestsFilter.java:463) (ActiveRequestsFilter.java:173) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (JiraStartupChecklistFilter.java:75) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (MultiTenantServletFilter.java:91) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (ChainedFilterStepRunner.java:78) (ApplicationFilterChain.java:235) (ApplicationFilterChain.java:206) (StandardWrapperValve.java:233) (StandardContextValve.java:191) (StandardHostValve.java:127) (ErrorReportValve.java:102) (StandardEngineValve.java:109) (AccessLogValve.java:554) (CoyoteAdapter.java:298) (Http11AprProcessor.java:864) (Http11AprProtocol.java:579) (AprEndpoint.java:1665)
at java.lang.Thread.run(Thread.java:662)