Aqui está o script:

<script type="text/javascript">
// <![CDATA[
$(document).ready(function() {
  $('#file_upload').uploadify({
    'uploader'  : '/uploadify/uploadify.swf',
    'script'    : '/upload2.php',
    'cancelImg' : '/uploadify/cancel.png',
    'folder'    : '/uploads',
    'auto'      : false,

    'onError'     : function (event,ID,fileObj,errorObj) {
      alert(errorObj.type + ' Error: ' + errorObj.info);
    },
    'fileExt'     : '*.wma;*.mp3',
    'fileDesc'    : 'Audio Files',
    'scriptData'  : {'fileID':'20541','hash':'2e1177c09a6503d11b1a401177022de50409e96279a2dbb11c5aef5783d231c975da22e2ddfd480b5e050f4fb09d9b7caa47a71ab0150b7c462b06d06e61e664','hashit':'fe458d423c6d1c18248b73dad776a9d4a6ff1ac9fc4b07674b3715b4992a80b9d2b4e3a340973642497d66ac8e8d57d7aa737f8911a784888b164e84961f177a'},
    'onComplete'  : function(eventID,ID,fileObj,response,data) {
        window.location = "http://www.messageshare.com/welcome/file_farm/20541/fe458d423c6d1c18248b73dad776a9d4a6ff1ac9fc4b07674b3715b4992a80b9d2b4e3a340973642497d66ac8e8d57d7aa737f8911a784888b164e84961f177a";
    }
  });
});
// ]]>
</script>

eu preciso mudar'auto' defalse paratrue.