i need some help big time i love mw2 and really enjoy playing it.  a couple of months i had been playing black ops and went to go back to mw2 and it wouldn't let me connect to the matching making server or anything like that.  also when i went onto split screen with friends the awaiting challenges number would count very slowly.  i figured it was that disc was buggered so i went off and got another work fine for a couple of weeks then went to play again one day and the same problem occurred could someone help me solve this issue PLEASE