Duckwork lights with wag wag having a problem. worked great until... now turn on lights with separate switches, wait for them to warm up, turn on wig wag switch, and i can hear the 'clicking' of the wig wag, but lights don't wig wag. I turn off the wig wag switch, but i can still hear the 'clicking' as though the wig wag is still on. I turn off the lights all goes off. strange. any ideas??