Ata MATSHITA DVD-RAM UJ-850S

On Acer TravelMate6231 de-installed op.sys.Vista and installed XP pro 32bit on SATA HDD.
ASPI configuration on AHCI controller.
Can not find driver for this device MATSHITA DVD-RAM UJ-850S on acer-euro site or panasonic site even on global site like it not exist!! even in discontinued ones!
Strange is that some data disc read and some not? which can be read on other computer...
problem happend after reinstalling xp...and instaling some flash usb drivers...

i tryed to reset with CD-dvd fix program from dougknox.com and tried to reinstall firmware but that was for Vaio...and can not be installed... even if is for same device....


really strange,but XP recognize it,and says it working fine!!!