You can't burning it onto the dual layer media because of the PTP/OTP problem. You can patch it or if you have a mod chip that will work to. I don't know if I can post the patch here or not. The swap disk method can work also.
Patch info file says
s many of you are probably aware, the PS2 has problems running DVD9 games
backed up onto dual layer media due to to problems reading from the second
layer. This is because the data format on burnt DL discs is different than on
pressed discs (burnt = OTP, pressed = PTP). However, we have discovered a
software hack which allows the PS2 to read even burnt OTP discs resulting in
working dual layer backups.
If you do patch the image try this method:
1. Create an image with Nero/DVD Decrypter etc on your HDD.
2. Patch with toxic patcher.
3. Burn to disk with Nero/DVD Decrypter.
Try this method if you don't have DL discs