Hello, this is my first post in the community. I wired up the HS210 (not the KIT) like it said in the instructions, but If the old switch on the other end is not on, the HS210 has no power. If I turn the old switch on, I get lights on the HS210, but it keeps turning on & off. (I can hear it clicking over and over). I didn't think that I needed the KIT version to make this work. The old switch box on the other end does not have a neutral, so I'm sure I'm installing the HS210 in the right location. Can anyone help me out? Thanks.