If for some reason you can't get it to animate then you can make it so it runs by default without flash, and when you click to toggle it, make...
javascript: alert('Flash is currently unavailable for this site.')
Or something to that effect.. and I'm not sure whether or not it is a flash site to begin with, because I recently reformatted my computer (damn viruses ^_^).
I don't know how well that would work, just throwing out ideas..