Copying DC backups

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I have sucessfully copied a DC backup, but had some problems with TDK (80Min) cd's does anyone else have the same problems?
or does anyone know of n e other CD's that don't work?

[Ciipher]

I'm also having a few problems with TDK 80m CDRs (Mine are D-View 80 minutes BTW) - Have copied working backups of Tony Hawkes 2 and Virtua Tennis with CloneCD and both work, but both also crash at random intervals....

Bearing in mind I'm completely new to this, was hoping someone could poke me in the direction of whether it's the CDRs or just that I'm doing something wrong? ???