[jQuery] date picker doesn't work

[macsig]

Hello, I'm trying to use the date picker plugin but I have a issue
with it.

I load all the required files
jquery-1.2.3.min'
'date'
'jquery.datePicker'


and I create the picker

<script type="text/javascript">
     var $j = jQuery.noConflict();
          $j(function() {
              $j('.date-pick').datePicker();
            });
  </script>

I use jQuery.noConflict() since I use scriptaculous as well.


When I load the page  have the error below:

$j(".date-pick").datePicker is not a function
$j('.date-pick').datePicker();


Any idea?
Thanks for teh help