1) check to make sure the power cable is plugged all the way into the floppy.

2) check the boot sequence in your BIOS to make sure the floppy is first

3) if your floppy cable is not notched, make sure the end with the red stipe aligns with pin 1 on the floppy

4) make sure there are no settings in your BIOS to ignore the floppy drive

5) make sure the disk goes all the way into the drive. With some of the recessed ones it's hard to tell. You should hear some sort of click when you put it in.

Jub