CD-rom devices not detecting. need help!!!!

[Amatur3]

hello
about a week ago i booted my computer up and everything was going as usual unitl i tried to read a disc on one of my cd drives. well the problem was when i opened "my computer" it showed niether one of my cd drives.i went into my biops and everything was still there and i aslo went into device manager and everything was there as well. i have no idea how to fix this please help


*****windows xp pro( with all new updates), amd xp 3200, geforce fx 5200 ultra, 512 ddr 2100, 40 gig western digital hard drive. geniric cd/rom drive, plextor cd-r/rw drive********