my gear of war 3 limited edition xbox 360 will NOT stay connected to xbox live for some unknown reason. i do have a moderate NAT but i"ve never had this problem before. not even with my first elite back when i had it. ill connect to live and 3-5 minutes later im disconnected and then i reconnect without issue. im starting to think i need to have it sent off and fixed. but id rather not considering i dont want to wait a week to play any of my games. please someone help me out here.