internet explorer 9 - PrettyPhoto for videos keeps playing sound in IE9 when lightbox closed -

i using prettyphoto 3.1.5 , jquery-1.8.3.min (have tried jquery-1.6.1.min).

i using prettyphoto on videos (youtube). in ie9 when lightbox closed, audio continues play.

i have not edited source code, it's not have done. have attempted use few different codes have found supposed fix issue, made lightbox fail work. when videos clicked on change in code merely treated lightbox link , directs youtube.

i tried use code on page: video everybody/prettyphoto flash fallback in ie keeps playing audio after video removed

however, unclear code replace suggestion there no match in prettyphoto 3.1.5 code.

thank you.

it work me upgrade plugin 3.1.5 , add rel=prettyphoto