Refer to the Information Bar on your browser's window and select Allow active content. If the applet is still not showing go to Tools select Internet Options. Under Advanced tab, scroll down until you find Java (SUN) and select Use JRE [some version number] for applets. In Windows Vista, go to Control Panel. In Classic view you will find the Java icon. Double click on it to open Java Control Panel. Under Java tab, click View... and select Enabled. You may need to restart your computer. If you didn't find Java you need to download it from Java.com, it's free.