hey so ive just been unbanned for boosting, and when i click xbox live > player match it comes up with the screen you normally get then it says 'black ops is loading' then a message pops up saying 'error joining or creating sesion' i can close that message of but when i go search for a game, for example i wanted to play team deathmatch on core, you have to click 'CORE' to get the game types up, well.. it does not let me click 'CORE' for somereason :s nor anyother game type.. wtf is happening! :s