[cadman]

I have just recently got a premodded ps2 with messiah2 which has worked awesome, however it will not play MGS2 substance or sons of liberty. It will not play the original or a backup of these games. The MGS2 games will boot up and run up until the "press start button" screen. After pressing start it will go to the next screen, load new game or load game, etc...........after making a choice it will go back to the "press start button" screen. It will just keep looping between these 2 screens. I thought the disc was bad but have tried others too with the same results. Any suggestions?