Did you copy the debug configuration when creating the demo configuration?

Nope. I copied the Test Config - this stuff is pretty new to me and this is what I was told to do :)

If not then check the assembly that you can't debug:
Select Build in the properties window. Make sure 'Optimize code' is not selected and, in the 'Advanced' settings set 'Debug Info' to full

I'll give that a try and let yo know how it goes. Thanks for the quick response.