Vista Install fails, xp lost dvd drives

> First of all the upgrade advisor found no issues with my dvd drives, just an
> nforce network device.
> I also created a restore point, prior to upgrade and installed all xp
> critical updates prior.
>
> After allowing the Vista Ultimate run, I came back to my chair and XP was
> back running, told me that it has rolled back to XP because it was unable to
> find any DVD drive. Contact to purchase CD's.
>
> I have 2 different DVDRW drives installed and were running fine in XP.
> They are now showing a yellow exclamation point on each drive.
>
> AOPEN DUW1616/APR
> LITEON DVDRW SOHW-1693S
>
> Obviously I had to have a DVDRW drive to even run the DVD in the first
> place, and Upgrade advisory found no problems with either drive.
>

> I am back in XP Pro with no DVDRW drives. Properties on these drives say
> the device driver is present but the device is not.
>
> Sytem:
> AMD Athlon 64 X2 Dual Core Processor 3800+ 3GB RAM Video: GeForce 7600GS
> K8N Neo4 Series Main Board
>
> Also, both bios and boot up sequence recognize the drives which are on
> secondary master and slave. I have also opened the cpu and unplugged and
> replugged the ide ribbons in to the drives.
>
> Any suggestions on getting these drives back up and running on XP and
> then hopefully completing a complete VISTA install?
>
> Any suggestions on