I am using Access 2003, I fallowing you class and set the control tip text to show the text with the mouse on the button in Access 104. I also tested with the DB from the download and still does not show the text. First  I went a select repair Access, but still witht the problem. That is why I send you an email perhaps another students have similar problem and have the solution.

I will try re-istall Access later and see that will resolve the problem.