I've been trying to find a suitable replacement for my lisa 2's floppy drive (it didn't come with one).

I have tried an SE 800k and a Plus 400k floppy drive. What happens is that the drive keeps trying to eject a floppy (even is there's nothing there) all the time. SO it's constantly doing the eject noise. Both drivers work fine on their machines.

Could it be that my lisa's floppy drive controller is damaged? or it just doesn't support mac 800k drives (even if it recognises them as 400k)?

Any solutions? or is my lisa doomed as a lisaquarium?