so....ive been having alot of trouble with left 4 dead recently i will connect to a game then disconnect from the server withing the first 3 mins of gameplay, odd as my ping is fine and so forth, ive begain to wonder if it is my internet connection? but that seems fine. also i use the free version of avira ive wonderd if this has anything to do with it?? im at alose and not being able to play is a right pain in the so any suggestions on things i can do to help?? like ports and such?? thanks!