I upgraded a PC from WinME to XP, Both CD-ROM drives will work at the BIOS level (I loaded xp from it), but now my Lite-On 4835 CD-ROM does not see disks. MY LG CD-RW works fine. Both are visable in the Device manager, neither shows an error. I have tried switching from CSL to Sl/MA setup and back, and nothing makes a difference. There locations show up as 0 (0) for the CD-ROM and 1 (1) for the LG. any ideas?