My new Xbox 360 Slim can't read my CoD: MW2 or CoD: MW3 discs. They were working fine until about 2 weeks ago and I can't find a solution. I've bought both of them again, buffed my old discs, and cleaned my discs, restarted my console and done all the other stuff Microsoft has told me to do. It's not working and I'm not sending it in to get repaired because I don't have that kind of money. Please help, should I download them or get a new Xbox?