Backups play fine for a week then Die??

[Dal]

Hi,

bit of a funny one this.

I have made 2 backups recently using my 107 with latest version of NERO 6, using Datasafe Ritek Disc burning at 2 X.

I make an image first and then burn to a -r which is no problem boot it in my Messiah Powered PS2 and plays fine.

But then a week later a boot the game again its slow and choppy. But if i use the original it plays fine.

now do i think its the discs im using, or maybe im using NERO or what.

I use the same discs for Movies and they are fine.

Any help would be much appreciated

Dal