Gearheads of War

I got Cod4 for Christmas because my wallet was hurting a little bit from all the other purchases I have been making lately. So when I pop in the disk to play I go straight for multiplayer. There is no rank by my name and the searching text at the top right of the screen says "searching for games" or "checking quality". Eventually it will say no games can be found. I doubt that out of 300,000+ gamers online no games can be found. I could also not join any of my friends' games. After turning off my xbox and giving it a rest, it froze when I tried searching for a game, and I talked to my friend and he said the same thing happened to him. Has anyone else encountered this problem today? If anyone has had this happen to them and knows a way to fix it that would be great. I would hate to have to miss out on FFF because of possible router settings or something.

Thanks, Noobpancake