8004027A DVD-video playback graph failed

I get the above message when trying to read a VCD Video.

My configuration:
DVD Drive: JLMS XJ-HD166S (Liteon), Firmware DS1E
Power DVD 5.00.0603
Pentium 4 2.4GHz 2400MHz
Bus 133MHz
Memory: 512
Video: NVIDIA GeForce4 MX4000
Win XP Prof 2
directX 9c
ASPI: 4.60

The story so far:
ASPI was reported as corrupted ASPICHK from adaptec
Updated with latest Adaptec Drivers - ASPICHK said OK, Nero said corrupted.
Used ForceASPI7 put ASPI back to version 6
NEro reports ASPI ok
Reinstalled Power DVD
REinstalled Drive
Found that Region code not set - when attempting to set to Region 1 system queried (maybe because I’m in Thailand) and asked for a disk- then accepted it. So,maybe it read something?
Normally Windows just reports no disk. No problems with VCD, CD or CD-ROM

Any ideas what I should do next?

Sorry, quick update - Nero reports the disks as being DVD+R