I am having issues with my Cybersyncs triggering my Flashpoint 320M. When I try to use the 1/8 to 1/4 cable it does not fire. The strobe will still work with the optical slave built in if I use another light to trigger it. The light on the receiver flashes, but it does not trigger. Could it be as simple as needing new batteries, or is there another method to test it?