The circle app is awesome (make it more readable ?)

I've uploaded it, nice job ! Actually, as I had modified your app and loaded into the watch, I just deleted all the apps (factory reset) and reinstalled circle app with a fresh start. And the heart rate is not showing up. I have it in the widgets, but the hr circle is empty, just the - symbol in the circle. I remember I used to have this issue previously, but I can't remember how I solved it... Any clue ?