title: Drupal contributed modules problem
body: <p>I extracted a contributed module into the <code>sites/all/modules</code> folder, but it is not yet appearing in my admin panel under <code>Administer</code> -> <code>Site building</code> -> <code>Modules</code>. What could be the problem?</p>
  
  <p>I tried clearing the cache, it made no difference.</p>