My friend just got me another copy of Modern Warfare 2 after my first copy didn't work when I put it in my Xbox 360 S I got the other day at Wal Mart, I put the game in my Xbox and it said the following: "This disc is unreadable. 1. Clean the disk with a soft cloth. 2. Restart the console. For more help visit www.xbox.com/support." The game was not opened when I got it and the disc has no scratches or apparent damage. Why won't it play? It's brand new! This is frustrating. Please give me an answer. Also, it has a 250G hard drive if that matters.