Sony DRU-510A Reboot after successful burn

Problem: After a successful burn with Nero (Nero 6 Ultra Edition the DVD is ejected and then the DVD Recording drives (Sony DRU-510A) stops responding cannot even shut the tray, then the system (Shuttle SN45G / Barton 2500+ / 512 DDR / 120GIG / SONY DRI-510 / Windows XP SP1 w/ all the latest updates / NOT over-clocked stabled under all loads and used to work fine with LiteOn CD-RW) reboots… upon returning to windows the burned DVD works fine.

Very annoying

Any ideas?

-power Supply is fine
-system memory is fine
-cpu is fine

CD-R Software installed
-Sony DSS 1.0.1
-DVD X Copy Gold (Uninstalled now)

System Driver
-Latest NForce Driver
-Disabled Nforce IDE driver and used windows Default.

Thanks in advance for your assistance.