Problems with ND-2500A

I just got my NEC DVD_RW ND-2500A and I can burn CD’s but not DVD-Video.
I can play and see movies on my DVD but when I try to record an Image either with NERO or DVD Shrink, the process gets freeze after a few minutes.
Ussually starts to read at about 2000Kb/s and instead of getting better it start to slowdown until it get stuck.
Instalation was smooth, and with Nero CD-DVD Speed everything look ok.
What should I do, review or check?

My System:

Intel Pentium 4 2.2 Mhz
256 MB RAM

Secondary IDE Channel:
MAster:CD recorder LITE-ON LTR52327S (DMA on, Autorun on)
Slave: NEC DVD_RW ND-2500A.(DMA on, Autorun on) firmware 1.6

Windows XP Home Edition
Nero Burning ROM 6.0
DVD Shrink 3.1
DVD Decrypter

Thansk a lot!

Try reinstalling the latest version of Nero (free update available on their website for all 6.0 users). Also, download ForceASPI to make sure you have the stable 4.60 APSI layer installed.