Did you include the Fix Version field on the screen in JIRA? Also, ensure that Fix Version field is not in a hidden mode which you can check this on Field Configurations page. You can refer to this Knowledge Base: http://confluence.atlassian.com/display/GHKB/Planning+and+Task+Board+Cards+are+not+Visible+when+%27Fix+Version%27+Field+is+Hidden
You haven't mentioned if you're using the new Rapid Boards or the existing Planning/Task/Chart boards. Assuming it's the Planning board you will need to make sure that the project is configured with a ranking field. The easiest way to do this is configuring the project to use the Scrum template, the documentation for this is at:
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