I have an MSI combo lan kt266 chipset atlon xp2000 266fsb 256mb pc266 Nvidia Gforce4 64meg agp 4x & an Hitachi GD5000 DVD rom . My DVD durner is NEC3500 using the firmware it cam with. i use nero 6601. My DVD rom will not read any format of data writen to a DVD it does not even recognise a disc when it is inserted data video nothing. Hope this is enough info for help.