i've been playing the xbox 360 and no freezing. until i played nba 2k7 and experienced some freezing but not too much. also i beat gears of war perfectly no freezing. but online with gears of war freezes every 20-30 minutes? what could have gone wrong? any ideas. i thought it was my media but i am using Verbatims dvd+r DL and burning at 2x, so i burned a copy at 1x and still i am getting some freezing. it is only onlin e though and most games are fine and i dont see any freezing. although gears of war is the only game i pretty much play and for a long period of time. hence, i only notice freezing on gears of war because i play it online all the time. no red lights just freezes and when i reset and power on its fine until 30 minutes later, another freeze up. anyhelp?