Hello, I have a simple problem, but I can't seem to find how to solve it. I hope someone here can help me out. I have a lamp that is connected to 2 light switches. I wanted to replace 1 light switch with a motion sensor. In the previous switch 2 black cables arrived and 1 grey cable left. First I bought a motion sensor which couldn't handle the low wattage of my LED bulb. I figured out my mistake and bought the correct one. Now the problem is that the light sensor only has 1 entry and 1 exit. I tried each of the cables in every configuration, I even tried putting both black cables together in the motion sensor as well as the grey one but nothing seems to work. The light turns on and then never turns off again. Does anyone know what I am doing wrong here? Thanks!