IDE OAK Technology CD-ROM Problem

I have a 433 Mhz Intel Mendocino, with 160 DRAM, 6.4 Gb. I have a
cd-rom which use to use oak technology drivers. Now, I had a SCSI
adaptor card and used it for two weeks. Now, I want to use the cd-rom
on IDE, and when I wanted to change the configuration, I didn't find
the SCSI option in Control Panel (Windows XP). I deleted the primary
disk, formatted it, but when I booted my system with a win98 diskette,
it did find the cd-rom. When i wanted to use it, i received the message
"drive E - cd-rom - not ready " or "do you want to abort, retry,fail
?"
when i choose fail, it says "fail INT 24". When I look into the
btcdrom.sys file form the boot diskette it says that the CD-rom is
configured to SCSI ?! But I don't have a SCSI adaptor. I think that
when I installed my CD-rom on SCSI, it did something to the BIOS. Would
someone please give me an answer, please ? Thanks, Roger.