cant read dvd games!!!

[rogerauy]

need to know why my chip cant read backup ps2 dvd games.
dont know wht chip i have, but heres the backup method

1.put ar2 in
2. press reset twice
3.in ar2 menu swap the ar2 disk with dvd utility disk
4. press w/o codes
5. cd-rom bounces out automatically. swap with backup.
5.play

plz help. thx.