What am I doing wrong?

[joeygame]

OK. Let's setup the situation. I have a USB Mod. I can successfully backup the CDR games and play them with my GameShark.

Based from reading the forums I bought the Pioneer DVR-A04.
I use the burning software it came with and tried the Primo DVD (which is essential the same program) from psxcopyworld.co.uk

I am trying to backup my GTA3 and Medal of Honor
I assume no patches for either.
The software is telling me the are successful copies and I can read them on the A04.
HOWEVER, my ps2 won't play them. What am I doing wrong here?

PLEASE HELP!