For the last few weeks, I will be in mid game, then all of a sudden the screen will go black, and the button on the front of the xbox will start flashing the way it does when you open/close the tray, then it will go to the dashboard and say opening tray. I will have to hit A, it will then say reading disc and I can start the game again. It seems to be happening more and more as time goes by. Does anyone know what is causing this and if there is a way to fix it? Please help, thanks!