The other day i took my 360 apart looking to hotswap halo 2. And i didn't have the magnetic piece to place on top of the disc to stop it from flying out (didn't know i needed one). So, i tried hotswapping without putting something on top of the disc. And now it won't play halo 2 anymore, but it will play other xbox and xbox 360 games just fine. And my halo 2 game plays just fine on my other xbox 360. Does anyone here know how to fix this?