Okay, I know this might be a bit too late or long to post something, but...
Dude, seriously? Disks are never the same. Some works when you buy it, and some doesn't. Like mine. You're supposed to try it, not go ask someone else if they work or not... After all, not all [GAME-NAME] disks will work perfectly the same. Like not my Super Paper Mario works perfectly fine forever like the others'...