After the new Halo 3 updates, I can't Play Matchmaking,Forge,Custom

[rimmerjt]

Games,Campaign or Theater. HELP!? When I was on Spring Break, Halo 3 worked perfectly when I was offline. But when I got home Sunday night, I tried to play and whenever I tried to lay campaign, it would say "Players failed to load content" , When i was on Matchmaking, it would do the normal thing, find players then go to the lobby, when I get to the lobby it switched maps, then after 2 seconds boots me out. I am not able to play Campain,Matchmaking/Forge... Custom Games, and not able to play saved videos. I tried deleted the new Halo 3 maps, then downloading them again, didn't work though. I tried to just download the map pack again, even tohugh it was on my hard drive, still didn't work. The disc looks fine, and I contacted Xbox Support and told me it my be my console and I should try to recover my Gamertag on a friends Xbox 360, but I don't think it's my Xbox. ANY Help is Appreciated.
I cant my parents are watching some show, I can't play now, but I'll probably be able to play later