Im using the XFBML version of the Like button but the "Share it" box with the space to leave a comment doesn't show up after clicking "Recommend". The rest works fine.

Im using this code:

<fb:like href="www.google.cl" width="300" action="recommend" font="lucida grande"></fb:like>

And, in the end of the page

</body>

<div id="fb-root"></div>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<script>
  FB.init({appId: '1234567890', status: true, cookie: true, xfbml: true});
  FB.Event.subscribe('auth.sessionChange', function(response) {
    if (response.session) {
      // A user has logged in, and a new cookie has been saved
    } else {
      // The user has logged out, and the cookie has been cleared
    }
  });
</script>    
</html>

Do you know what is happening? Any advice is warmly received. Thanks