four of my maps stopped working in halo 3 what should i do??

[shadowguy65]

yeah so 4 of my maps stopped working
-epitaph
-narrows
-the pit
-snowbound
each time i try to play on them it says failed to load content i dont know why..
any ideas? please?

 

[barrelchick]

Either your disk has a scratch on it or your xbox has a bad disk reader. If you think it might be your xbox with the problem, you can buy a disk cleaner at any major retail store. (walmart, best buy, etc)