Alright so first things first. I am in a college dorm room. They have security settings so to plug my Xbox into the wall I needed to clone the Mac (or physical) adress of my laptop. I get on the internet fine, I can play any other 360 game online (cod 4, black ops, gears of war 1&2, bfbc2) but when I try to connect to a match in Gears 3 It searches through games, finds them but never attempts to join any. It just says "No suitable matches can be found" and keeps searching. I left it for about 20 minutes one time and never got into a game.
Any help would be GREATLY appriciated. I am dying to sink some good multiplayer hours into the game.