So i keep trying to get online on Black Ops 2, but it keeps giving me many different types of error messages(i'm not connected to the internet, something about a friends list, etc). I read online that port forwarding would help my predicament but when i tried it, it still wouldn't work!

I can get into games VERY RARELY, most of the time it boots me out to the multiplayer menu again. When I do manage to get into a game, i play for about 3-4 minutes before i get the "Connection Interrupted" sign and get booted out again. Netflix, Youtube, and other internet-required apps run perfectly fine... it's just BO... Am i doing portforwarding wrong?? Or is there something greatly wrong entirely?? Any help would be much appreciated!