Screen sharing on Android remote device

I'm trying to use the free version of TeamViewer to conect to an RC Airplane Transmitter that is using Android lollipop.  It is a Spektrum IX12.  Others who have this radio have connected and shared the screen of the Android device successfully.  However after I connect, I do not see screen sharing on the dashboard as detailed on the following link:

［Removed by Moderator/ Please attache a screen shot  instead of the link］

What am I doing wrong?