not reproductional

[cheesefade]

I have some funny but frustrating issue.

Some weeks ago i've modded my xbox with an enigma.After all the reading about evox,ftp and isoz i decided to try to backup my games.

I used evox 1.8 to boot,flashfxp for transfer the files to my pc and xisov073 to compile the files to an image.After that i burned the iso with VOB instant writew to an dvd-r using the Pioneer a04.All worked fine,i copied f1 2002 and TestDrive.

Present day,i have bought three more games and i want to back them up too.It just doesnt work anymore.I even used xboxcopy to be on the save side.I do the exact some thing as above,and everytime the xbox says "this disc may be damaged".The 2 games i manage to back up do play,but now when i run tests with them to copy,the duplicates also wont play.

My questions:
-is a volumename important ?
-wich do u prefer:xboxisotool,xisov071 or xisov073?
-what burnprogram is used best with my device{primodvd wont work)?
-is it a known isssue that most of the games cant be copied?

When u have reach this i really thank u for spending time reading my humble post.If anyone could take some time to answer it would be really nice