You probably need to ask the authors of the clients why it's not working, or have a look through their docs to see if there is anything odd about logging into OnDemand. Check the requirements - they might be relying on something OnDemand doesn't support or isn't enabled.
You may check if "Accept remote API calls" setting is turned ON in your OnDemand JIRA.
It is located in Administration (gear icon) -> System (menu item) -> "Settings" block on a web page.
If it is turned on then it is better to contact the author for help just like Nic said above.
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG