I wanted to add a dimmer to my media room lights. The lights were controlled by 2 three way switches. I bought a single pole dimmer because i was just going to just remove and cap the other switches. So i did that and connected the dimmer and which had two black wires and a green wire coming out of it to the black, red, and green wire (left the white wire capped). The lights did not turn on. After trying to figure out what went wrong, I bought a three way dimmer and switched it out with the single pole dimmer. I put the regular switch back on the other outlet and the lights still did not turn on. I then removed the dimmer and put the regular switch back on and still no lights. So i went and bought a multimeter to test for power and got positive results when testing the black screws, red wire screw, and white wire screw (when switch on). Please let me know what to do next or what could be the cause. Thanks...