We have jira installed using mysql database. Besides this, we have conflence installed using its own mysql database for spaces but jira database for user delegation. When using both systems as a user, system logs the user out. For example,
while i am online at jira, if i log in confluence, automatically the jira logs me out. And then, confluence logs out respectively.

We are using both systems with evaluation license.

What may the problem be?

Thanks.