Are you saying you can't ever read from the floppy drive or just that you can't boot from it? If it's just the later check the boot disk sequence in the BIOS.
If the floppy is first in the boot sequence and it still isn't accessed then the problem can't lie in the Windows installation can it? Must be hardware fault somewhere.
What do you see on the screen with a bootable floppy in the drive on startup? Does it even spin?
Could always boot from a CD-ROM if you can enable that option in the BIOS.