Help: Copy Problem

[Beyon]

I use to make backup copy by using Nero (disk copy without error correction) and played it in my playstation which has a mod-chip installed. So far this method works fine.

However, I've encountered problem in copying the following two games today. They are Beyblade: Let it Rip! and Yu-Gi-Oh: Forbidden Memories. The disc I made simply cannot be read by my playstation. When I check the disc out in Window explorer, the disc appeared empty although file properties indicated that there are several hundred MB files in the CD.

Is this a new protection method in the latest PSOne disc? Or.... How should I proceed to make a workable copy from these disc?

Thanks in advance for the help.

Beyon