MSD gurus, HELP

I have an MSD7 AL2 with a crank trigger ignition system. The 7 AL2 just came back from MSD and the crank trigger sytem is new. We tried to fire the racecar today and there was no joy. We cannot get the flying magnets to send a signal to the distributor through the 7 AL 2. there is no spark to the plug wires, but there is spark to the coil. (trust me its there, it bit me BIG TIME, no laughing!!!) Does any one know how to OHM out the pickup unit on the crank wheel? We OHMed out the intermediate wire from the box to the pickup and it's fine (It's new also). Any help would be greatly appreciated.