I have DV-10P-WH that was installed to replace a 600P. The 600P worked fine, but I had added lights and needed the 10P. When I installed the 10P, it does not turn on. The switch just clicks but will not click into the on position, it only clicks back into the off position. The lights come on when I push the switch, but of course go off when I let go of the toggle. Thoughts? Thanks.