I bought and installed an IPS06 occupancy sensor switch, but it is turning the light on no matter how bright the room is. If I adjusted the ambient light control dial to 0, then the light is not turning on at all, even in a totally dark room. However, if I adjust the ambient light level to 1, then it is turning the light on all the time, regardless of the brightness in the room. I have tried to adjust to 2 and 3 as well. It is the same problem as if it were 1. Any reasons why this is so an how to solve it?