title: Uploadify not firing the onProgress event
body: <p>I'm using Uploadify on my website and trying to integrate my own, more advanced progress bar. I need to get the status of each file upload regularly so I was planning to use the <code>onProgress</code> event of Uploadify. If I do this:</p>
  
  <pre><code>$('#file-upload').uploadify({
      'uploader'  : '/assets/flash/uploadify.swf',
      'script'    : '/upload.php',
      'cancelImg' : '/assets/images/cancel.png',
      'auto'      : false,
      'multi'     : true,
      'queueID'   : 'file-queue',
      'queueSizeLimit':5,
      'sizeLimit' : 104857600,
      'onSelect'  : function(event, ID, fileObj) {
          files.push({id:ID, size:fileObj.size});
          addFileToQueue(ID, fileObj);
          return false;
      },
      'onError'   : function(event, ID, fileObj, errorObj) {
          alert("Error: Type: " + errorObj.type + " Message: " + errorObj.info);
      },
      'onProgress': function(event, ID, fileObj, data) {
          console.log("progress");
          updateProgress(data);
      }
  });
  </code></pre>
  
  <p>Problem is, I never get <code>progress</code> logged into console, nor does any code in the <code>updateProgress</code> function ever execute. The file uploading does actually work, as I can see the files being uploaded into the uploads directory. I also don't get any errors in the Javascript console.</p>
  
  <p>What could be wrong here? Thanks.</p>