SOLVED! This is to do with the DLL trust policy, in my case somehow FSX automatically mistrust DLLs or EXEs. To enable them manually (default) follow these steps First you must remove the trusted entries in the FSX_SE.cfg under the [TRUSTED] section, I only removed the ones that apply to the Aerosoft Airbus and Active Sky which where both not working properly. After that go to Start-> run-> type "regedit"-> click enter, now click on Software\Microsoft\Windows\CurrentVersion\WinTrust\Tru