Bradley, are you sure your battery is well charged. If you have a voltmeter, check for voltage (red and black leads) at the battery connector going into the ignition box. Then check at the pulse switch connector (again, the red and black wires). With the ignition ON you should have at least 4.8V at the 'battery in' connector.

The pulse switch voltage is regulated by the SS unit, so you will not have more than 5.0V at the pulse switch connector.

What voltage and mAh rating is the battery pack that you are using?

If you were getting a spark before - when you turned the ignition OFF - it would seem that the ignition box is working - at least it is charging the output Capacitor.

If your battery is OK then I guess you best send it back to the manufacturer.