Solved"Lost Network Conection" (REALLY NEED HELP!)

hi, i was wondering if someone in this section could help me, i used this hack yesturday; it was to change loads of options. And when i went into a game, i kill some one and the game crashes the MP lobby screen saying "Network Connection lost"
please help as i cannot play the game now.

Thanks.

Your not banned!!! I've got this problem too yesterday because my xp messed up. there's out trainer what fix that problem, you can download it on mw3 hacks section, the trainer called Modern Warfare 3: JabUnlocker V1.1 (Fixed) by jabbathehutt‎. There's one option called "Fix Double XP" and after that you should be okay and ur game is playable again. KTHXBYE.

Problem fixed, closed and marked as solved.