Recently, I've been getting the following error whenever I try to log on.

"You Have been detected cheating once. Further cheating may lead to temporary ban and deletion of username from the server."

Or something along the lines of that.

It happens no matter what account I log on to, I even turned all my hacks off (deleted from the mem stick completely)

Can somebody explain to me what's going on? I can't get on the server at all.