Error compiling Visual Studio 2010 EditorClassifier Extension Template

I'm trying to create an Editor Classifier Template project and run it. When I attempt to build I get an error message stating:

"Error trying to read the VSIX manifest file 'extension.vsixmanifest'. Exception has been thrown by target of invocation."

Any thoughts? I've tried googling this but di开发者_如何学编程dn't have any luck.

I am working with Visual Studio 2010 Ultimate and the VS 2010 SDK Beta 1.

Thanks, Nick

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Are you using a matching version of the SDK and the product? The Beta 1 SDK won't work against anything other than Beta 1 of VS2010.