I have owned the game Gears of War 3 on my xbox since it was on sale from the xbox marketplace online. recently after signing on and loading it up, I somehow got "Disc Unreadable" error for this download. So I unplugged the hdd, plugged it back in and same thing. Then deleted cache, deleted gow3, and redownloaded it to no avail. I can play my downloaded gears of war 2 with no error from the xbox mp, but i cant play gow3? Any ideas on what I can do before I go grab another hard copy?