Hacking Help with a friend's wii - can't play backups.

[fgsfdsyo]

My friend has TP hack, HBC, Preloader0.28, and Gamma002fix channel installed on 3.2E.
He has IOS38,53, and 55 installed.

However, he isn't able to play any backups.
He gets errors that it says "unable to read the disc" burning with Nero at 4x.

Any ideas how to help him?
I'm running backups smoothly (with gamma channel) on 4.0U, but I have no idea why his stuff doesn't work.
Suggestions/Advice?