As you did not say if you are using, desktop or laptop computer. Which version of Music Maker are you using? what is your windows OS? Xp, Vista or Windows 7? therefore, please do some work at your end and see.
1. Are you usre your audio driver is ok, I mean in Music Maker you will find some available audio drivers, if there are more than one try to change and see.
2. Check the volume level(Control Panel/Audio) or from speaker Icon at ther right bottom side.
3rd option, instead of making your own song, import Demo Song available in the Music Maker and export it as a wave and see the result.