Without actually seeing your configuration, it is hard to say but - it could be that the white and red wires are both travelers. When wired to the original 3-Way switch, were the red and white wires...

Model : Hardware Version : Firmware Version : ISP : A few days ago I set up a schedule to turn a light on at sunset every day of the week. The day I set up this schedule, sunset was at 7:07pm. Now, a...