Gentilmente, non riesco a capire perche' non mi appaiono i pulsanti per formattare un testo, di seguito il codice ma non riesco a capire dov'e' l'errore...

Grazie in anticipo

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">


<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>CKEDITOR</title>


<script type="text/javascript" src="/ckeditor/ckeditor.js"></script>




</head>


<body>
<div style="height: 104px">
<textarea cols="20" name="TextArea1" rows="2"></textarea>
<script type="text/javascript">
CKEDITOR.replace( 'testo', {
height:"400",
enterMode : CKEDITOR.ENTER_BR,
toolbar :
[['SpellChecker', '-', 'Undo','Redo','Cut','Copy','Paste', 'PasteText', 'PasteFromWord', '-'],[ 'NumberedList', 'BulletedList','Outdent','Indent','-','JustifyLeft','JustifyCenter','JustifyRight','Ju stifyBlock', '-', 'Link', 'Unlink' ],[ 'Preview','Print','-','Bold', 'Italic'], [ 'TextColor', 'BGColor' ]]


});




</script>




</div>
</body>


</html>