Error ocurrs in createingVCProjectEngineObjectClass

Hi,

I've been getting error(ComException, Saying cannot create instance of CLSID xx in ICLassFactory because of 80131902 error) creating VCProjectEngineObjectClass to load vcxproj file. Microsoft.VisualStudio.VCProjectEngine Assembly version is 10.0 and Visual Studio version is 10.

It's ok with 9.0 version of Microsoft.VisualStudio.VCProjectEngine. But using 9.0 i cannot load vcxproj but only vcproj.