There is no sound playing

Hello. There is no sound playing. I clicked the button 'Audio enable' (the sound Icon). Then, I selected a sound file in the dialog box. The audio file selected. Clicked on the ' Play ' button-the video was played, and there is no sound. Why? What should I do to play the sound? Sorry for my bad English.

The sounds needs to be in WAV format.

Perhaps you tried using an mp3?

Thx. So everything works. I have tried to hook up the audio track from a video file. Also failed.