I've installed a Caseta Dimmer PD-6WCL with a companion Pico switch. I worked well for about a week, then the Pico switch stopped controlling the light. I've tried re-paring them but never get the flashing LED lights described in the instructions (and what I got when I first installed them). I've tried resetting the Dimmer switch (3 quick presses and hold) but the LEDs don't flash, rather the unit fades the light on an off repeatedly. No amount of tempo practice is helping. I've tried cutting the power; that does not reset. I'm stuck and out of ideas ... help?