Dan, your issue can only be one of three things or perhaps all mate.
(1) Air in the system.
(2) Incorrectly fitted rotors, remember that the PF and DBA rotors are both directional.
(3) Bed in procedure not completed properly.
Drop me a PM if you require more help with this and I will give you a ring.
If you require more fluid just give me a shout and I will get it shipped out to you.
Alex.