Auto disconnect after joining

Hey Guys,

If I join a GMod server, I get a auto disconnect by showing the Motd.
I can’t click any button, cuz 4 seconds after joining i get an automatic disconnect.
In the server there is a message like this: “[CSG] Mr. Jackass left the server (Disconnect by user)”
But I didn’t do anything.
Who can help me?
And sorry for my english :blush: