|Try a disk in it and make sure the drive works. If not, recheck the cable. There will be a faint red stripe along one edge of the cable. That edge connects to the # 1 pin side of the drive's pin connector. Or often one of the pin holes on the cable will be blocked and that will match up to a missing pin on the drive's connector so that the cable can only be attached one way. Check that the cable on the motherboard end is similarly connected.|
Also, if the floppy cable has more than one connector make sure the drive is attached to the one AFTER the 7-wire twist. That is, you'll have the connection at the motherboard, then a floppy connector, then the 7-wire twist, then a second floppy connector, where you want the drive connected. If you connect the drive to the middle one the computer bios or windows or both will see it as drive B: and may be giving the error because of that.