Hi, I have a DJI phantom 1. I installed new firmware, calibrated the TX, did everything necessary for the firmware upgrade aside from GPS re calibration, here is why... When I power on the phantom, it goes through the normal flashes, then it goes to 2 yellow flashes then pause, then two yellow flashes, pause, and it does this constantly. What does this mean? I am unable to calibrate the GPS. when I flip the GPS/ATTI switch ten times nothing happens... it just keeps blinking the two yellow flashes. Any ideas? Its fairly frustrating!