MyGUI with Mogre 1.7.4

Hi,
I try to port MyGUI with Mogre 1.7.4. but i have an exception 'AccesViolationException' when i call this fonction

[DllImport("MyGUI.OgrePlatform.Export.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void Export_CreateGUI();

Someone can help me ?, the compilation of MyGui and its wrapper seems to be good.

Thanks

I don't have solution with MyGui so I stopp with myGuy, i work now with miyagi. All work fine