Messegner Sound Notification

I cannot get this to work at all, what am i doing wrong ??  in bxsimplemessengermodule.php i have thi

$sOutputCode  .=

"    
<div id=\"sound_container\"></div>
<script type=\"text/ { soundManagerInit(); });</script>
<script type=\"text/javascript\">

in messenger core

// add received messages into current chat box;
$el.append(oResponse.senders[i].messages_list);
soundManager.play('beep');

// draw new chat box in predefined output's block;
$('#' + this.chatBoxSettings.sOutputBlockId).append(oResponse.senders[i].chat_box);
soundManager.play('beep');