ieee1394 DVD Drive burning problem.

Had a very stable system until a virus outbreak required a
complete format and reinstall. Now have the following
problem i have been unable to burn using DVD decrypter,
NERO OR any other burning software, on my sony 500
external unit.

The following happens, decrypter reads the empty disc info
on iso read, but select iso write and start burning,
indicator light on machine blinks a few times then goes
out. decrypter acts as if its burning, but nothing
happens, and buffer indicator does not fill, left running
for 10mins. Nero appears to burn but again nothing happens.

I am on xp homeSP1 and all avaliable xp updates applied.
Device shows as working ok in device manager, listing as
sony i link drive ieee1394 sbp2 device. I have installed
aspi 4.60, and then updated to previously installed 4.712.
under settings. ASPICHECK confirms correct istall. Under
I/O tab in DVDdecrypter i have selected spti interface,
only setting that detects drive. I even deleted the
drivers for my 1394 card reinstalled it and allowed xp to
re install drivers.

I am able to rip ps2 and dvd in iso and file mode no
problem. The drive has been tested working ok connected to
the 1394 port on my laptop. Under device manager i have
compared the system info on the 1394 connection including
drivers listed and can see no difference.?. I have tried a
new connecting cable, and disabled the MS burning engine.
Selecting the cd option under nero i was able to quick
erase a cd-rw disc, but it locked up and would not burn.
Nero info tool is able to display the correct info about
the drive.

This problem does not effect other computer operations.
This is driving me mad. I have missed something obvious i
just hope some guru out there can help, or point me to
another site that might