Did you wait and see if the Hue would update lux values after a given time? I read that Hue only automatically reports lux values every 5 minutes (someone please correct me if I'm wrong).
I'm pretty sure I did the same song and dance as you testing out my new sensor (flash a light into it and wave the arm for motion). I've also found hitting the refresh button in the sensor's device page gets it to change right away.
Otherwise I'm using it successfully as the lux sensor for the Eternal Sunshine app! The app automatically controls a set of lights based on the value from a illuminance sensor. I've been using the values from my living room motion sensor to drive the dimming values of my office lights (perfect for working from home and partly cloudy weather that keeps dimming and brightening through out the day)!
