I have a phantom V2+. I have connected my flytrex live which is working. I have done the recalibration (advanced) but I don't get the green check mark at the end. the calibration numbers appear ok i have calibrated the sticks, and have 7 satellites When I take off the phantom has a mind of its own. it just starts to fly away. I am in GPs mode. This has happened three times now, two crashes and one save any thoughts?