Plane 4.2 beta release

Pitch PID not working. Nav_Pitch signal tracks Pitch when motors off, But when motors turned on, Nav_Pitch signal rails to zero and does not track Pitch signal anymore. I am using the same PID values I used before using Arduplane 4.2 Beta. Here is a log file of the test:

Thanks, William

p.s. Here is a link to see the vehicle I am testing: