Transitions shapes not draggable/Package Load Failure

Hi,

I have installed Visual Studio Professional Edition followed by the latest release of the Visual Studio SDK (April).  I create a very simple DSL based on the Activity diagram template in order to test everything is in working order.  However once I build the DSL and run Visual Studio debugger runs which opens a project based on the new DSL in a new instance of Visual Studio.

I can drag on Activity shapes and start and end points onto the design suface however I am unable to drag on transitions or "link from comment" shapes.  This may be something very simple or an issue which others may have seen with the routing engine.

The only other thing I noticed was package load failure for package Microsoft.VisualStudio.TeamFoundation.VersionControl.HatPackage where closing the debugging instance

Any help is appreciated

Brendan