PX-716SA won't write to R/W media

I have a problem that even Plextor says it never heard of. The drive reads and writes to all media perfectly, as long as I work with one media at a time. What I am saying is I can burn and read CD-DVD/±Rs all day. I can work with CD-DVD/±R/Ws all day. But not one after the other. If I even read ROM type media all R/W media used without rebooting the system is seen as UDF media. Plextor thinks some flag is being set in the operating system. I don’t have a clue as to where to start. I have updated every driver/bios/firmware and installed every service patch I can think of no joy. Has anyone seen this before?

Any suggestion help would be greatly appreciated.

Motherboard ASUS P4C800-E Deluxe
Operating system Windows XP
All drives are SATA no IDE

rvnevada :a