[quote]... build the source project (I assume that means jus the main on - not necessarily the UI wrappers etc) in debug mode ( assuming that means just Build Solutions as I don't see the option for building in debug vs ?release?)
Have a look at your VS Build menu, and see if you can find the "Configuration Manager..." option. If not, go to Tools, Options, Projects and Solutions, General and check the "Show advanced build configurations". Then, have a look at it and you will find the Debug/Release configuration option.