Jquery dialog + Ajax in Grails

Jquery dialog + Ajax in Grails

Hi, i'm Marcos from Argentina, so my english isn't the best...
I'm working with Grails... and i use jQuery dialogs for some functionalities. My problem is that i can't close the dialogs... only with the X button in the corner... i tried with .dialog('close') .dialog('hide') and .dialog('destroy'). my code is like that:
<html>
...
<body>
...
    </g:remoteLink></td>
    <td><g:remoteLink
            action="action"
            controller="controller"
            update="dialogTramite"
            onLoaded="mostrarDialogo('#dialogTramite')">
      text
    </g:remoteLink></td>
...
<script type="text/javascript">
  $(document).ready(
          function() {
            $("#dialogTramite").dialog({
              resizable:false,
              modal:true,
              width:400,
              height:450 ,
              autoOpen:false,
            buttons: {"close": function(){ $(this).dialog("close"); }}});
          }
          );


  function mostrarDialogo(dialogoSelector) {
    $(dialogoSelector).dialog('open');
  }
</script>
</body>
</html>

What i'm doing wrong? comment: after i close with "X" button... i can't reopen it...

thanks

Marcos