hi there,
you have received quite a valuable solution from all these guys. this problem is faced by us very often as we are in the hardware sales business. i could try to help u out with it first of all does it detect in the bios if it does then its working, 2nd have you received any floppy disk with the cdrom drive that u brought if yes go to control panel and select add remove hardware click "next" again click "next" when it ask "do u want windows to serch for new hardware" select "no" then click "next" in harware type select cdrom controller and click "next" then click have disk and give the path to your floopy drive and it will select the drivers and if this does not help or u dont have the floppy disk the one more suggestion if you have a dump copy of win98 in your harddisk reinstall it or not the u can use the suggestion given by anjali have a nice day man