Part I - You must have Java installed on your computer.Check here to check if Java is installed on your computer.
After checking, you will see this message if you have the latest version:
If you do not see "Congratulations!" you must install Java from http://java.com/
or from here where you see all the Java downloads, including 64 bit versions if you use a 64 bit browser, as well as the Mac version.
Part II - Very Important - Watch this short video explaining how to enable Java in Real English® or in any other program which uses Java:
Tick "Always trust..." or "I accept the risks..." (there are no special risks if you keep your anti-virus up to date, in my humble opinion, but I obviosly do not take responsibility for anyone's computer) and then click on "Run".
I use the French version of Windows 7. "Exécuter" corresponds to "Run".
First click on "Always trust" (J'accepte in the picture), and then on "Run" (Exécuter in the picture).
Part III B - Using the Recorder Applet
Click on the red button once (1x) to begin recording.
Start -> Accessories -> Entertainment -> Sound recorder.Record your voice and listen. If you do not hear anything, check your connections and sound levels.
Start > All Programs > Accessories > Entertainment > Volume Control, select Options > PropertiesSelect 'Playback' and press OK. Then you can increase the levels of the relevant sliders such as the 'Volume Control' and 'Wave' sliders. Also, make sure those two sliders do not have the 'Mute' or 'Mute all' box selected.