Recently I brought the Sony Xbox to my cousin’s place so that I could enjoy playing the Call of Duty: Modern Warfare 2 game with them. The game worked well and we enjoyed playing the game. Later, I returned back to my home and now when I am trying to play the game, I am unable to do so. When I am clicking on multiplayer, the Xbox is showing black screen with a message “Disc Unreadable”. What is this all about? Any idea? How can this be fixed?