Mogre 1.7.4 Error！

Hey, guys. I meet an error from mogre 1.7.4 and i need you guys help!

Compiler notice Mogre.dll External component exception!(SEHException)

That is the information that i check in Stack Window, compile notice error there:
> Mogre.dll!Mogre::OverlayManager::CreateOverlayElementFromTemplate(System::String^ templateName, System::String^ typeName, System::String^ instanceName) 行 247 + 0x27 字节 C++


Also, the app can't read the media correctly:


but:

i have add the dir correctly in the cfg file

Did you verify that the resources actually get loaded, specifically "SdkTrays.material"? It should be listed in the Ogre log, if it was.

Did you verify that the resources actually get loaded, specifically "SdkTrays.material"? It should be listed in the Ogre log, if it was.
i have fixed the error, because i 'new' the overlaymanager