RPM whilst cranking? HELP :-\

[blown_g]

Hi guys Im having a problem which I think it might be related to triggering.  I have a 36-1 trigger wheel with a crank sensor I purchased from http://trigger-wheels.com/store/contents/en-uk/d10.html

My cranking speed is 150rpm, battery is strong.  Does this rpm sound a little low?  Its a vw 4 cyl 16v engine.
Im not sure if the signal Im getting is true as my ignition outputs are not sparking whilst cranking.  When i test for spark via Vems I can see spark fine but when cranking its not sparking, I have tried both the coils or a light bulb.

Please some ideas as I have no idea whats going on anymore dont trust myself.