What am I doing wrong with backups

[brian.smith21]

I have tried to burn a backup of GTA Vice City (from doublepack) and...well I haven't had any luck yet. Here's what I've tried using.
All discs are were burned on a Plextor PX-708UF.....

ISO Craxtion 3.1
Autopatched the game and created an iso
Burned with Nero at 2.4x
*COASTER*

XISO 2.2
Used the autopatched default.xbe file and created an iso
Burned with Nero again
*COASTER*

Dragged files using Nero and created a copy that way (No ISO)
*COASTER*

Im using a Xecuter 2.3b with EvoX .3935 bios
Media is FujiFilm DVD+R @ 4x Max write capability (They work flawlessly as movie backups)
I haven't tried to burn a copy without a patched .xbe file

What am I possibly doing to screw this up!!!