Nero DVD Copy Problem

I have made a DVD Slideshow with Nero Photoshow. Nero burned it to a dvd-r perfectly. It will play in any of my home dvd players. I wanted some extra copies, so I tried to copy it With Nero Burning Rom 6, that burned the slideshow to start with. The burn process fails everytime I try to duplicate a dvd that I have burned in Nero. It will make a perfect slideshow, but I cannot copy them.
Sure need some help.

PC Specs:
Windows XP SP2
Pentium 4 Processor
1024 MB. Ram

Welcome to CDFreaks Furom, try to copy your slide shows in ISO format in Nero Burning Rom.