Cant get online with Reach

Had this game a few days now but cant get online with it, when i go to matchmaking it says “loading information from xbox live” for about 10 seconds and then says “information could not be retrieved from xbox live”. My nat is open, connection is fine and all my other games work. Any help would be appreciated, the game is useless with no multiplayer as the single player game is not very good…thanks

Unplug and replug in the router and internet cable, if you have one.

Do other games work online?