title: xt:commerce a plugin to display box
body: <p>I am trying to implement a xt:commerce plugin that displays a "box" at the frontend, here my structure:</p>
  
  <p>-> the php data here "plugins/xt_test/boxes/xt_test.php" contains:</p>
  
  <pre><code>defined('_VALID_CALL') or die('Direct Access is not allowed.');
  
  if ($params['box_id']) {
      $show_box = true;
  } else {
      $show_box = false;
  }
  </code></pre>
  
  <p>-> the template "plugins/xt_test/templates/box_xt_test.html" contains a simple</p>
  
  <pre><code>&lt;div&gt; test box &lt;/div&gt;
  </code></pre>
  
  <p>Nothing is displayed in my shop therefore I am wondering if I am missing something? or perhaps I need to set up something specific in the "install" document? thank you very much in advance.</p>