as far as i understand it seems something is not conected right, atleast that is the first impression (im my other posting i mentioned conectors).
feels odd if the laptop has a boultin floppydrive though. it MIGHT be thast the ribboncable has slipped/broken...
ifthis is the case it is not something you can repair easily yorself in a laptop (if you are not verry good with tweesers, soldering small parts...).

hmmm just thought of somethng. have you rebooted? and do you always UMOUNT the floppy before you remove it, if not that might be the problem, if you eject a mounted floppy it will mess things up some,even a reboot might not fix it 100%.