We have had reports that our programs made with Flash may not advance from the title screen when clicked. This happens when the audio output is not connected (you don't have headphones or speakers connected). The following programs may have this problem:

• Introduction to Topographic Maps Version 2.0
• The Theory of Plate Tectonics Version 2.2
• Earth's Atmosphere and Its Seasons Version 1.1

Make sure you have headphones or speakers connected and this problem will be solved.