Backup Copies will not Boot

[mstubbs]

I have a playstation 2 with a USB Mod Chip.
I have tried to creat backups of my PS1 and PS2 games but none will boot. I get this error no data and the system locks up.
I can read the disk on my PC and the file struture looks the same as the original disk. I have used Nero, CDRWIN, CLoneCD, and others to no avail. What could I be doing wrong? The disks I'm using are Memorex, HP, Imation they are all CD-RW disks.
The installer told me to start with PS1 disks which should boot direct but don't. He claims that he tested it before it left the shop.
He claims it's a format problem.
Thanks
Mike