Halo: Reach Issues?

[ROFLBRYCE]

Sooo my Halo Reach multiplayer has been working perfect...until now. I go to join a game, I hit the lobby. All is fine. Vote on maps, mhmmm okay, now entering the game.

Standard black screen...ok..now it's not going away. Left on a "Connecting" screen. Then it says "Changing host", and I'm the only one left in the game. It just boots me to the menu, blank post-game carnage report and no credits gained.

Why is it doing this? I'm the only one on the connection, I have open NAT, Low/Excellent packet loss rate, and average upstream bandwidth. I've got no idea why it won't connect me to games, as it does just fine in BlackOps and MW2.


EDIT: Forgot about this screen, it pops up with "RETURNED TO LOBBY: You were returned to the lobby because the party leader appears to be away from the game"