Not really certain but in most cases, it may be the internet connection,,, If you're getting kicked, it may be with the stability of your connection. To check on your connection, connect online to multiplayer then go to options then check if you would see and option to check connectivity info. Check your firewalls, routers, and also the ports you have setup for the game. Search up the ports for Black Ops 2 on PS3. Cheers.