Power steering pump differences + CDF racing pulleys
 

I have the CDF racing aluminium pulley set and noticed that my power steering pump pulley is the pressed on type so i bought a Blobeye power steering pump with a bolt on pulley.

I fitted it yesterday and i had no power steering, so reverted back to my old one.

Are the Blobeye PAS pumps different to the Bugeye in some way that's stopping it from functioning on my car? Or have i bought a faulty pump?