I connected motors and servos with main port and aus port by this page http://px4.io/docs/quad-vtol-configuration/
The transition switch doing well for fw mode and mc mode. During fw mode puller motor is rotating but servos has no signal.
I separated signal cable and power cables (+&-).
Then I just connect the signal cable to aux output rail and connect the power cables to receiver for getting power.
I do not know how to type you can not understand, you need to add a steering gear BEC 5V PIX of the steering engine output is not 5V, so you have to add one, and then you try it again.