How can I make the audion download button work?

Hi,
How can I make the audi player download button work? It keeps showing this link The file /home/users/web/b956/ipg.tutubranchcom/ult/heftydrumz/wp-content/uploads/sites/8/2015/07/www.heftydrumz.com-Tempo-85.mp3 doesn't exist; check the URL
for the audio download button when clicked. How can I make my fans download the beat when the button is clicked?
url: http://www.ultramusicgroup.com/heftydrumz/music/

Regards