Can't Login after Upgrade to 5.6

[pbarmak]

We just upgrade jasperserver from 4.0.0 to 5.6 followin the Upgrade Guide.  Everything seemed to go smoothly, the upgrade script completed successfully.  But then, I started up tomcat and went to the app page, but it will not allow me to login with any of the user credentials we have, including jasperadmin.  The error is "Invalid credentials supplied."  I don't see anything in /var/log/tomcat7 related to this.  Any help would be appreciated.

[hozawa]

First, check you log file to make sure there isn't any program error.

If not, go to you database and check the content of jiuser table.

[pbarmak]

I have checked the log file, as I mentioned in my original question, and there is no mention of a problem related to login. I have also checked and even re-imported JIUser, all users are enabled and seem to be fine.