I'm feeling a little dumb but it's not working for me. I have the P3 transmitter hooked to my ipad and start up DJI pilot. Go to RC calibration. I leave sticks in the center like it says. I hit calibrate. Then is says to rotate sticks several times. I do this and the percent nuber in the middle never leaves zero and the finished button is half grayed out and not clickable when I am done moving the sticks around? So tell me what dumb thing I am doing wrong. Haha Thanks..