Okay, the gory details....new P4, iPad Mini 2. Started initial start up. Powered up drone, powered up remote, turned on iPad. iPad already connected to remote. DJI Go says to do a IMU calibration, it does that without a hitch. Then it tells me there is a firmware update. It downloads fine, tells me to plug into the drone. I unplug from the remote and plug it into drone. Time passes, then I get a message saying update failed. It's done this about 5 times and I don't wanna screw anything up. What am I doing wrong?