it looks like it is on the site you gave ..if you installed this one (looks like the one you are saying too):http://extensions.joomla.org/extensions/multimedia/multimedia-players/audio-players-a-gallery/4197
..then it for sure is a joomla plugin. I can't say the differences with yours, the got similar name.
If you didn't install it via the traditional joomla installer, then I don't think the above trick will work..
In any case, what code do you use to show the player elsewhere on the site, in an joomla article for example ? something like this ?
if yes, are you able to show the player in a joomla article ?
if yes, did you enable: VirtueMart > Admin > Configuration > Frontend Features > Enable content mambots / plugins in descriptions?
if yes, are you using exactly the same code on the product's short description ?
if yes again, then something else is wrong.