After 1,5 hours of teamviewer support i now have it working:
It has nothing to do with GSX, but with the Simconnect in FSX.
What i did:
- Repair Acceleration pack ( or normal editon).
If this does not work; try this:
- go to C:/Windows and then WinSxS. Then search for "simconnect" and right click on open location. Then remember those locations and boot into safe mode, and delete those THREE folders of SIMCONNECT (ONLY THOSE)
Huge thanks to Virtuali