Creating an Ajax-Enabled Web Site

http://msdn.microsoft.com/en-us/library/bb386580(v=vs.100).aspx

I follow the example of the above website...it mentions:

If there is a delay while the page runs the SQL query and returns the data, theUpdateProgress control displays the message (Getting Employees ... ) that you entered into theUpdateProgress control. When running the web application, I could not get out the message : Getting Employees ...  why is it so?