I have a new Phantom. I'm trying to get it ready for a first flight. I cannot get the Compass calibration to work. I flip the GPS/Atti switch 10 times quickly, but get no yellow light. I've tried several times. I may be running firmware 3.12, if that matters. I have been unable to get Assistant version 2.14 to run, so I ran version 2.12 instead, and it tells me the firmware is 3.12.