Help! 12 v conversion

I'm trying to convert my 62 vbb system to 12v. I have everything hooked up according to the wiring diagram, but I get no spark. From the stator, junction box, to the cdi unit, to the coil, to the spark plug...... I know the green wire looks out of place in the picture, the gray wire should be hooked in the green wires place ( cdi unit). The yellow wire is just a pig tail for ground. The way I have it set up in the picture, I get one spark and that's it!!!!!!!!!!!....What am I doing wrong?? Any one familiar with this conversion??? Electrical is out of my league!!

Cheers!!

 

 

 

 

 

What parts have you put in? List your:

Stator

Flywheel

cdi

coil

And can you show us the diagram you're using?