Did everything compile cleanly? No warnings?
When you run it are there are any messages in the console? The connections in the .xib have been double-checked in the connection inspector? You might consider placing a NSLog statement in the btnClicked method to verify that the action method is being called when the button is clicked.
If you can't resolve your issue send the non-working project to
[email protected]
and I will locate the error.
Bob