Buttons with Audio, & Revisiting Slides/layers

Hi- I am having trouble with my audio.  I want the audio to always restart when revisiting a slide.  I have set the slide preferences and layer preferences to "restart when revisiting a slide"  for the most part it is working.  The only time it is not are on slides where I have button you need to push to hear the audio.

For example, when the user gets to the slide they have three buttons they need to push to hear  the audio, then can move to the next layer.  When you revisit the layer (with the 3 buttons) and click on a button, the audio is starting from where the user left off it is not restarting from the beginning.

Any advice?

Thanks!