New Post: Defining Scope in MEF with CompositionScopeDefinition

I'm having trouble using CompositionScopeDefinition to define scope for my exports. I have seen the code on the BCL blog and its a very simple example. In my example I have an existing AggregateCatalog and CompositionContainer that I want to add a CompositionScopeDefinition to. Full details below:

http://stackoverflow.com/questions/16943121/defining-scope-in-mef-with-compositionscopedefinition