IntegraMOD

I have had IntegraMOD installed for over a year, I have not installed any mods.
I have done nothing other then normal everyday post and such.
When I try to log out I get this message "Invalid_session"
It wont let me log out???
I can do every thing as normal as admin.

Any suggestions!!!
Thanks

Empty your cookies. that will also log you off...

Yes i figured that out!
Thanks
But what is the problem!!