FSModelExp.dle> failed to initialize

[Woodylepic]

allways get an errormessage concerning the SDK Plugins in GMax when i start it up. I installed everything in the default folder the installer wanted it to install.
Here are my installation paths:

GMAX: C:\gmax
FSX: C:\Programme\Microsoft Games\Microsoft Flight Simulator X
FSX SDK: C:\Programme\Microsoft Games\Microsoft Flight Simulator X SDK

Pluginpath in GMax: C:\Programme\Microsoft Games\Microsoft Flight Simulator X SDK\SDK\Environment Kit\Modeling SDK\3DSM7

And these are the errormessages:
DLL failed to initialize.
DLL failed to initialize.
DLL failed to initialize.
-- Unknown property:"getPluginPath" in undefined

Has anyone en idea what is wrong?
Thanks a lot!