Need help on Backing up MS Train Simulator

Need some help here. Trying to backup my MS Train Simulator, CD1 burns and works fine, CD2 burns ok but is nto readable and cannot be used....any ideas?

Thanks!

i had similar problem with ms cfs 2, solution for me was WRITE and BURN with clone cd at x2 only, cd2 worked fine after that?
don't know if its any help to you?