After the new Halo 3 Updates, I can't play Matchmaking/ Forge/ Custom Games

[rimmerjt]

/Theater /Campaign. 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 did twice

[Mike]

happened to me too, i think u gotta download the new heroic map pack for free on the market place.