title: Uploadify returning $_FILES as a blank array
body: <p>I'm trying to implement Uploadify into my website project, which already had a very basic file uploading system. I have uploadify configured to submit a form post, which transfers to a backend uploading php script to do the uploading and sorting of the images. However, I'm getting nothing after the upload, the $_FILES array is completely blank, and the Uploadify forums and documentation are no help at all. Here's my code:</p>
  
  <p><strong>Front-end upload page</strong></p>
  
  <pre><code>&lt;script type="text/javascript" src="http://code.jquery.com/jquery-1.7.2.min.js"&gt;          &lt;/script&gt;
  &lt;script type="text/javascript" src="/modules/default/themes/uploadify/jquery.uploadify-  3.1.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript"&gt;
  $(function() {
      $('#file_upload').uploadify({
          'fileTypeDesc' : 'Image Files',
          'fileTypeExts' : '*.jpg; *.jpeg; *.png; *.gif',
          'method' : 'post',
          'auto' : false,
          'swf'      : '/modules/default/themes/uploadify/uploadify.swf',
          'uploader' : '/modules/default/themes/uploadify/uploadify.php',
          'onUploadComplete' : function(file, event, ID, fileObj, response, data) {
              $('#pff').submit();
          },
      });
  });
  </code></pre>
  
  <p></p>
  
  <pre><code>//Further down the line
  
  &lt;form action="&lt;?php echo $this-&gt;url('upload')?&gt;" method="post" id="pff" enctype="multipart/form-data"&gt;
  &lt;div class="uploadfield"&gt;
      &lt;input type="file" name="pics" id="file_upload" /&gt;
  &lt;/div&gt;
  &lt;/form&gt;
  &lt;a href="javascript:$('#file_upload').uploadify('upload')"&gt;Upload Files&lt;/a&gt;
  </code></pre>
  
  <p><strong>Back-end PHP Uploading Script Segment</strong></p>
  
  <pre><code>$errors = array();
      $uploaded = array();
      $ids = array();
      $public = $this-&gt;app-&gt;config-&gt;upload_public_default;
      $user = $this-&gt;app-&gt;userSession-&gt;user;
      $gallery = $this-&gt;app-&gt;getParamInt('gallery_id');
      $userid = $user-&gt;user_id;
      if(!empty($_FILES['Filedata']['tmp_name']) &amp;&amp; $this-&gt;app-&gt;config-&gt;allow_uploads){ 
  //Code to upload the images to the user accounts 
  }
  </code></pre>
  
  <p>I've been trying a variety of different things for hours, and tons of suggestions from different sites and forums. Nothing has worked or given me a hint of what to do yet. I can't seem to pass the files through to the script. </p>