У вашего броузера проблема в совместимости с HTML5
Video shows a code in its early production for sound banks. This code needs to go with IE's sound code, as it redirects its folder's path. Once the code is activated, the sfx path name is swapped, loading any sfx from a second folder. codes are here: http://forums.kc-mm.com/index.php?topic=65113.msg1217059#msg1217059