I am setting up an Igiro v20 with a Powerbox SRS v16 and two MPX 16 Rx's. I have run through the setup assistant and each step has worked but there is no power to the servos. The giro has recognised the M-link, channel switch and slider and noted the correct channels for aileron, elevator and rudder, but nothing happens to the servos from the TX. I have by passed the giro and all is working. Have I forgotten something?