I'm not sure this will help, but I thought I would let you know anyway. I had a similar problem putting in a new floppy drive to an existing computer. I tried everything you did and nothing work. My last resort was to clear the CMOS. I did and it then started picking it up. It's worth a shot. Please let us know if you try it and whether or not it works.
BTW - that pc I'm referring to had award bios.
BTW - that pc I'm referring to had award bios.