This was the EXACT problem I had as well. The switches Staton sends with the kit are pretty cheap. You can buy a new switch as suggested, or take it apart like I did. There's a small brass thread inside where the screw fits that was off center, causing a completed circuit (i.e. "kill" state) with the frame, regardless of on/off position.
Unscrew the screw and detach the wire. Pry off the black plastic backing of the switch and you'll see what's inside. I had to straighten the threads and add some electrical tape in addition to the plastic backing. Try to visualize how the switch opens and closes the circuit, and make sure that the circuit is insulated and "open" when in the "on" position.