Hi Tony,
Welcome.
I suggest you reinstall Simlink :
Please disable any Antivirus and Firewall.
In Simlink Plugin Settings uninstall Simlink plugin from both FSX and FSX SE, then completely uninstall Simlink using Windows Programs and Features exactly as under .
If they exist delete directories
c:\Users\username\AppData\Roaming\Navigraph\Simlink and c:\Program Files\Navigraph\Simlink
Then download and install latest Simlink for Windows
If still an issue please see Moving Maps not detect flight in my FSX:SE simulator - #6 by Ian
Cheers
Ian