probs copying copies with Nero, Juggler, Clone, CDRWin etc

[Ferris]

first up, i have a Creative CDRW 8x4x32 (8435E), which copies everything (PC, PSX, Audio etc) fine except Dreamcast copies!

i have tried the following copiers with no luck

Nero 5.5 (gets to around 30% and stalls on standard DC copies, wont copy a self boot disk, just copies first few sectors and asks for a blank disk)
Clone CD 3.0.5.1 (hates my CDRW period)
CDR Win 3.8D (same problems as with Nero)
Disk Juggler 3 (same problems as with Nero & CDRWin)
Blindwrite (same problems as above, reports unreadable tracks as bad sectors)

is there a definite settings list for copying DC copies with Nero, or CDRWin? www.internetconvoy.com only seems to specify Disk Juggler.

i HAVE though managed to copy one game, "Jet Set Radio" (Jap) with no problems. Everything else won't copy. The copies i have received when i purchased my DC (pre owned) work 100% on the machine itself.

do i have a software or hardware prob?

any help is very much appreciated.