I'm at the end of my rope trying to get a Caseta Dimmer PD-6WCL in a 3 way configuration. I tried attaching a picture but the button just takes me to the main page. The first floor switch box has a white , a red and black wire. The black wire was connected to the "screw of a different color" that many of the on-line directions refer to. The second floor switch location nearer to the light I want to control has the same color wires but it also has a second set of wires black and white. The white that I think goes up to the light was connected to the black that I think goes down to the first floor. Unfortunately I didn't take a picture of the second floor switch before I started so I'm not sure where the black that appears to go up to the light(comes out of the same jacket as the aforementioned white wire) was attached on the upstairs switch. Hope this makes sense . I've tried many combinations of wires but I can't get it. Any insight is appreciated.