I've had a similar problem with my mobo and floppy drive. I tried 4 or 5 different ones (wanted to flash bios) and all I could do with it is format the disk, but right after formatting it, it wouldn't recognize it anymore. If I even to read what's on it, it also gives insert the disk crap (incl. brand new formatted, reformatted with that floppy drive, with files on it). I bought a pack of 10 brand new disks and none worked. Finally, I had to flash bios another way...It was frustrating, and I never figured out why it was doing it...That was with A8N5X board...