So I haven't played my xbox in a week and now decide to play it again. I turn on the xbox and put in the disc (Halo Reach to be specific) and it says "Unrecognized Disc" I thought the disc was a bit dusty after leaving it out of the case for a whole week so I polished it with my shirt and it still did not work. I decided to put a different game in and it still did not work. So I thought some dust may got caught in the tray. I picked most of the dust out of the tray area and tried it again. Nothing. There is no red ring and I can still play arcade games and demos I downloaded. I even tried to vaccum out the other pieces of dust in my xbox and it still did not work. Anyone have any ideas what I should do to fix this problem?