I'm trying to integrate the mp3 player but I can not work

MOD/FILE/VIEWS/DEFAULT/RIVER/OBJECT/CREATE.PHP

<?php

$performed_by = get_entity($vars['item']->subject_guid);

$object = get_entity($vars['item']->object_guid);

$url = $object->getURL();

$container = get_entity($object->container_guid);

$url = "<a href=\"{$performed_by->getURL()}\">{$performed_by->name}</a>";

$string = sprintf(elgg_echo("file:river:created"),$url) . " " . elgg_echo("file:river:item");

$string .= " <a href=\"" . $object->getURL() . "\">" . $object->title . "</a>";

if ($container && $container instanceof ElggGroup) {

$string .= ' ' . elgg_echo('groups:river:togroup') . " <a href=\"" . $container->getURL() ."\">". $container->name . "</a>";

}

echo $string;

?>

<!-- include the audioplayer js code -->

<script type="text/javascript" src="<?php echo $vars['url']; ?>mod/zaudio/audioplayer/audio-player.js"></script>  

<!-- set up the player -->

<script type="text/javascript">  

    AudioPlayer.setup("<?php echo $vars['url']; ?>mod/zaudio/audioplayer/player.swf", {  

         width: 290  

    });  

</script>  

<div style="margin:10px 0 10px 10px;">

<p id="audioplayer_1">Alternative content</p>  

         <script type="text/javascript">  

         AudioPlayer.embed("audioplayer_1", {soundFile: "<?php echo $vars['url']; ?>mod/file/download.php?file_guid=<?php echo $vars['entity']->getGUID(); ?>"});  

         </script> 

</div>