I have up graded my Naza V1 to V2 with the 2.20 software and new firmware. I did the basic and advanced IMU calibration also. I also calibrated each esc one at a time and after calibration I gave each one throttle and they spun up normally. I opened Naza program and selected the X4 configuration and then clicked on the "Test motors" Motor #1 did not spin but motor #2 spun as normal and motors #3 and #4 did not spin on the motor test. I moved motor #1 over the motor #2 slot in the naza but it did not spin up. I also calibrated my tx and all the sliders moved and then centered themselves and turned green and they moved in the correct way corresponding to each stick movement. But the motors will not spin up.