My HP Colorado came with it's own cable that has to be plugged into the controller or mb directly and has a connection to connect to the floppy cable end that would have plugged into the controller. I've tried using a standard twisted floppy cable to not have to use 2 cables, but it didn't recoginize the tape drive. Don't know if this helps.
Don't want to suggest anything too obvious but I installed a tape drive and my floppy also quit working. I discovered I had accidentally plugged the drive in backwards at the motherboard. I actually had to install a new floppy to get it all straightened out. I learned an important lesson though: DOUBLE CHECK ALL CONNECTIONS!