Dvd Copy Problem

Using an NEC 1100A 4X with Nero, DVD XCOPY, Ulead DVD workshop and Adobe Premier, I can not get a copy I made to generate copies. I can burn from the original disc, which is no longer in my posession, but can not copy from the discs I made.

Any advice would help! I am putting this in Software world too!

To make copies of copies try Pinnacle Instant Copy 7. It worked when I tried it. :)

thanks somebody!