After a couple of failed attempts I'm fairly certain I've got my PD-5ANS wired up correctly with the PD-5ANS on the line side and a mechanical toggle switch on the load side.The only problem is the toggle switch doesn't seem to do anything. From what I understand the blue wire going to the PD-5ANS should be sensing when the voltage changes, but it's not. I can measure the voltage at the smart switch and see that when I toggle the mechanical switch the voltage changes, but the smart switch never seems to notice. Is it possible I messed something up when I previously wired it incorrectly? Does anyone have any other idea what could be wrong?