Exec & QueryStatus methods are not triggered for Solution Add ins

Hi,

I have the following scenario:

• Add-in class (implementing IDTExtensibility2, IDTCommandTarget) registered for COM interop
• The add-in is added as a solution add-in by some code.
• Add-in is loaded correctly, the OnConnection is called with the proper ext_ConnectMode.ext_cm_Solution
• in that method, a named command is added using AddNamedCommand, and control added using AddControl to add an entry in the Solution command bar
• Command indeed appears in the Solution context menu. When clicked, VS complains that the add-in for the command could not be loaded
• Exec & QueryStatus methods of IDTCommandTarget are never called

Appreciate your help

Thanks,

Charles