Yesterday i was just going to do my usual, have great fun pwning n00bs on Demo Classic server, but i go on and it says "This key is not valid or been disabled" Can any of u guys help?

check ur email hampa prob. sent u a new one, that happened to me.

but that means i can't use my name Anubis anymore

EDIT: No E-Mail...

Your account should work now Anubis.