80 conductor cable not installed?

[Uranium-235]

On my grandmothers computer, I get this message. It HAS an 80 wire cable installed, I even switched it out with a new one just to make sure it wasn't a defective cable.

I then updated the bios to make sure it wasn't a problem with that. Motherboard is MSI K7T Turbo 2 and the HD is a ATA-100 drive. Both MB and the drive are ATA-100, and because of this bios detecting this wrong, it's taking the mode down to 3 (33). Anybody have any idea why the bios isn't detecting this right?