help with back ups

[spud-u-like]

I have no problems with down loading all files from disk.
I have no problems with patching the xbe file.
I have no problems with making an iso file.
I have no problems burning the finished files.

The problem is when i put the finished disk into the x-box, the game starts up with the software companys title screen then, say that the disk is durty or damaged? and will no play

Can anyone help me?