COD has always worked fine on my network, then all of a sudden starting a week or so ago, every time I try to enter a game, it simply won't connect. I can join the lobby just fine, party up with friends, and choose a map, but as soon as the load bar finishes on the bottom of the screen to get into the actual game, a small circular loading looking thing pops up just to the right side of the bar and I never connect. According to my friends, it says I leave the game instantly as soon as they connect. Like I said, I have never had issues with Xbox live before at the same house with the same connection (I use plug-in not wireless), and the issue ONLY happens in COD.
Update: I tried one more time last night to see if something had changed and wasn't even able to join a party with friends (it just said the party no longer exists). Also, I am able to join games already in progress and then can play the entire game with no lag whatsoever, but when the next round starts, I am unable to connect again.
Any ideas what could possibly be going on?