the other games work just fine? 3 of my specific xbox games don't work on my xbox, they used to work perfectly but suddenly they stopped working and whenever i played them a screen pops up that says "error: disc is unreadable", i thought the disc might be scratched so i bought those 3 games, even though the the discs i bought are new and not scratched it still displays the error message. all of my other games work just fine. the 3 games are Call of Duty Modern Warfare 2, Call of Duty Black Ops and Halo Reach