Do you mean you don't see any of the constructors' messages in the output window? Be sure you're looking at the Output window and not some other window.
A lot of the interesting code for this Try It is in the classes not the main form. You might look there to make sure it looks okay, but the main form should display some text, too, so if you're not seeing anything, I'm not sure what's wrong.
If that doesn't help, you can zip up the project and send it to me at
[email protected] and I'll take a look.