backed up dvd to dvd
 

hi all im new to this so i was wandering if someone could help i got hold of some backup dvds the other day and they work fine on my standalone + xbox and my friend wanted to borrow a couple so i said i would burn him one when i had with prassi done on disk to disk it wouldnt work on my m8s dvd but did on mine but the original backup does why is this any help would be much appreciated i also then tried with nero but the same happens.

i got you solution
 

have you try the verison 5.5.9.0 for nero ?

DO NOT DO DISK to DISK..Always make Images first..
For some reason I had the same problem..Only difference was I tried to use the DVD-rom to read the image of DVD-R but it failed..
So I use the A03 instead and everything went Great..
So technically unless you got a 2 x A03's or A04's to do Disc to Disc don't bother..Besides doing Disc to Disc isn't quite that good.