Error: Different game active?!?

[Shockeye]

Im trying to connect to a game in the lobby. I can get into chat rooms and such with no problem, but when I go to join a game I get the error "Cannot Join: Different Game Active"

I looked for help in the sticky posts and the only thing I found was a suggestion about check for parameters in the desktop shortcut. That wasn't it.
Does someone know what is happening?

[Kapyrna]

Do you have a mod active in the Game Manager?

[Stormsong]

Warnings.log, please.