My Xbox drive broke last Christmas so I sent it in to get repaired and I got it sent back. I was playing all my games fine and then I got Black Ops and Assassins Creed. The xbox recogninses the games as it shows up the image. I press A to load the game up the screen goes black and then goas back to the dashboard and give me a disk read error. Every other game I have works perfectly and the disks which do not work, do work on other xbox i have tried.