If I'm being honest, I don't think it will work - it's something to do with WD drivers being fussy with controllers. 
Try another brand IDE drive, set it as a master, connect a 4-pin molex from your PSU to the small floppy power converter and hook that up to the adaptor.

Try another brand IDE drive, set it as a master, connect a 4-pin molex from your PSU to the small floppy power converter and hook that up to the adaptor.