How do you go into the multiplayer mode on Mercenaries 2 for xbox 360?

It says that there is a multiplayer, but when you try to go into it, it says change server settings for multiplayer games, how do I do this?How do you go into the multiplayer mode on Mercenaries 2 for xbox 360?
you have to be on xbox live thats the only way possibleHow do you go into the multiplayer mode on Mercenaries 2 for xbox 360?
That game sucks and its a waste of money. I think the only good thing about it was the Song in the TV commerical....