I can't succes follow-me mode with TOWER App

Hello Gentlemans, I tried Follow Me Mode on my university football ground,

but I couldn’t success follow me mode.

Drone Can access his GPS coordinates. And My Android Smartphone can catch his GPS coordinates and drone’s GPS coordinates.

But Drone didn’t follow me… :’(

Anyone have good solution? My drone’s FC is Pixhawk 2.

And, My smartphones are HWAWEI HONOR 6, SAMSUNG GALAXY S8+, SAMSUNG GALAXY S6.

I just added android application video -->> https://www.youtube.com/watch?v=8CTqNIewwl0

Plz Save Me Gods!!

Please refer to this thread

Oh My God !!! Thank You T_T

By the way,… Can i learn how to upload past firmware on pixhawk2!!!

I really hope to success follow me mode T_T