Downloaded DJI Go 4 app, opened, selected "phantom 4 pro", enter device, next screen says Disconnected. Reboot app, defaults to "Mavic Air". Reinstall Go 4, same routine, Green light is on, (linked) but keeps saying disconnected. How do I get passed this ? The RC is linked with the ship, but appears go4 doesn't see this, and won't let me do anything further. I really want to get flying ! Tnx for any help in advance. Ric