Bot banned when joining a game.on server

[Numbertaker]

im not sure why this happens. it seems to happen for css and tf2 i join i a sever. and it comes up in the chat
"numbertaker is being banned"
"Bot ban"
"visted games.on.net for help"

i dont understand why can some one help me :S

[Chucky]

If you haven't already, Please fill in a ban appeal at the following link http://games.on.net/contact/