I bought the first halo game for the original xbox to play on my xbox slim. I already have a 60 hdd in the slim. When I put the disc in it says to download the game again or to go to support. The system is already updated as well. Any help as to what I should do to get this disc to work would be greatly appreciated. Also I have halo 2 for xbox and that doesn't work in the slim either. They work fine in my nephews 20 gb xbox 360 though. Any thoughts?