Problema de Mootools

[geoxxx]

Problema con mootools.

Código PHP:

  <link  href="js/formcheck/theme/classic/formcheck.css" rel="stylesheet" type="text/css" > 
<script src="js/formcheck/mootools.js" type="text/javascript"></script> 
<script src="js/formcheck/formcheck.js" type="text/javascript"></script> 
<script type="text/javascript"> 
    window.addEvent('domready', function(){ 
        new FormCheck('formindex'); 
    }); 
</script> 
 
<link rel="stylesheet" href="js/datepicker/css/style.css" type="text/css" media="screen" /> 
<script type="text/javascript"  src="js/datepicker/_class.datePicker.js"></script> 
<script type="text/javascript"> 
    window.addEvent('domready',function(){ 
        $('fecha01').datePicker({klass: 'black_datePicker'}); 
    }); 
</script> 
 
<script type="text/javascript" src="js/sexyalert/sexyalertbox.v1.2.moo.js"></script> 
<link rel="stylesheet" type="text/css" media="all" href="js/sexyalert/sexyalertbox.css"/>  
  

al quitar el datePicker me funciona el sexyalert... pero los dos dependen de mootools. y no funcionan juntos