I have a slimline PS2 with a matrix infinity 1.39 modchip. After I insert the disc, it will spin about 1/4 turn, then stop. It will just keep doing this over and over again. This is an purchased game. I picked up a copy, and had this problem, so I returned it only to find out that this one does the same thing. All other games, burned or original play just fine. Any ideas???