After having trouble on lift off with my P3S that had been perfectly fine before I upgraded to 11.1 on my iPhone 6s (On lift off the P3 flew backward) i decided to delete from my phone the old DJi Go app and reinstall the app from the app store. I did that and have not been able to activate app. Will ask for my ID and password as i have had for over six months and DJi will not except my ID. If anyone here has had the same problem please advise me what i should do to once again be able to fly my Quadcopters. I have three P3’s