Thanks for the exact error. You've at least attempted to help us help you.
Unfortunately, we need much more information.
You say 'add myself as an admin'. Is this through RCON? Direct Server console? XGUI while running a listen server?
What versions (SVN or from our ulyssesmod.net download page) of ULib and ulx?
Strategos has some validity behind his assistance attempt.
If you're running other admin mods, though we try to be compatible with just about everything, sometimes other addons won't let us.
Make sure you've only obtained ULib and ULX from our servers.
See also our FAQ site for access issues, one of which includes exact details for making a report to us.
http://forums.ulyssesmod.net/index.php/topic,383.0.htmlhttp://forums.ulyssesmod.net/index.php/topic,3068.0.html