Unrecognisable disc error when trying to play backups

hey guys i got my xbox360 modded last week by modders. My drive is a lite-on with iXtreme 1.6 with a kreon drive (v1.0). Well the problem is that when i put in my backup disc into the xbox i get a unrecognizable disc error. I used both XBC with image burn and then shcrotm to extract and burn with imgburn but both times i got the error. I checked the iso with agbx360 and all factors were good SS, DMI etc except for the verification (error 404 - game not in database i take it) but SS and everything was sweet.

When i used imageburn by itself after extracting through kreon drive all the layerbreak (set to optimal - 1,913...), booktype (DVD+R to DVD-ROM) and all other settings were set sweet but still got the same error. I even used to separate burners first was TSST - SH-s223b and the other was a LG from a laptop but both times still same error which rules out a faulty burner

Cant be something wrong with kreon drive as it extracts everything well (checked with agbx360) and cant be the discs as i am using verbatim DVD+R and gone through like 10 of them so unlikely that all of the discs are faulty by manufacture.
I have tried everything even the activator.iso which didnt work either.

Hope someone can help cheers