What exactly are you pressing, to go into Go Flying mode?

I have Garmin GLO in Bluetooth connection with iPad mini and after "connecting to device" window closes, I get "the connection to your gps has been lost" with the default "ok" to close window. I have latest update of SkyDemon and iPad and have had a year of reliable use using GLO with SkyDemon but can't seem to get it to work now. Help, anyone? Also tried with android and get same set of messages. The Bluetooth connectivity is confirmed and the GLO indicates satellite capture (steady green) so am at a loss as to what is wrong.