Not sure if this will help, but the orientation of the cranks is pretty important for the calibration process. In the article below, it suggests that the crank arms need to be pointing 'up and down' (perpendicular to the ground) for the calibration to work.


(from this article)
Once installed and paired, the CA500 computer picked up the power meter as fast as my Garmin Edge. The Pioneer system uses a zero point calibration and L/R sensor calibration that was a simple touch of the screen on the CA500. The L/R sensor calibration only required the crank-arm to be perpendicular to the ground.