Well I've downloaded some mods for L4D2 on the request forum thing and they work perfectly for a couple of games then they randomly just stop working. I don't know what the issue is. It isnt because I resetted my xbox because I did that and it worked when I played L4D2 again. Are these mods useable in any Xbox Live Versus Lobby? They seem to shut off when I try to use them in a live lobby.