How do I get audio files attached to smart shapes to start over when they are re-clicked?

Hello,

I have several smart shapes on my slide, all with an audio file attached to them.  These smart shapes are revealed when the user clicks the right click box.   When the user clicks a click box to show a new smart shape/audio before the other audio is finished, it cuts that first audio off, the first smart shape disappears, and the new smart shape shows its audio begins.  This is perfect.  The problem is when he clicks on the original click box again to show the original smartshape, the old audio picks up from the point where it left off.  I want it to start over. 

Can anyone help?