Simultaneous audio player

Hi, before everything thanks for the simple plugin..
I’m building a website with 4 compact audio player and I want thata the user can play simultaneusly 1 or 2 or 3 or 4 at the sometime…

Actually the “Check Botton” in the setting is “UNCHEK”, and when I play one sound the others stop…

I’ve try in different browser and also in a white Template…

Have you an idea why I can’t use this functions?? It’s really the most important for the site..

Thanks for your works…