My Garmin detects a power meter on my new Creo and shows me watts, but I am not sure how to interpret the readout. Is it my effort? Me and the bike combined? Just the bike? Confused. I can't calibrate it either; when I turn everything on I get the usual message "do I want to calibrate the power meter" but it always ends up with a "calibration failed" message. Anyone have any insight into this?