Can't figure out this stupid theme on tumblr

           </div>
            <div id="sideblog-twitter">
              <h2><a href="http://www.twitter.com/{TwitterUsername}">@{TwitterUsername}</a></h2>
              <div id="tweets"></div>
              <script type="text/javascript">
                  function recent_tweets(data) {
                      for (i=0; i<data.length; i++) {
                          document.getElementById("tweets").innerHTML = 
                              document.getElementById("tweets").innerHTML + 
                              '<a href="http://twitter.com/{TwitterUsername}/status/' + 
                              data[i].id_str + '"><div class="content">' + data[i].text + 
                              '</div></a>';
                      }
                      document.getElementById("sideblog-twitter-loading").style.display = 'block'; /* was none */
                      document.getElementById("sideblog-twitter").style.display = 'block';
                  }
              </script>
            </div>

Essentially what I'm trying to do is get the fucking twitter sideloader to load my latest tweets. It's doing fuckall.

http://tumblr.tn5421.me/

The theme is: Rank & File 1.2.4 by Sleepover.
Available at http://ranknfiletheme.tumblr.com/

It might just be me being dumb but I've been up too long and can't figure this shit out.