Need help for sorting date with dd/mm/yyyy format

Hi,

I have a table with 4 columns. The last one contains date (dd/mm/yyyy format).

But the date doesn't sort "properly". Can anyone help me ? (i'm completely new to javascript).

Here's a part of my code :

<link href="table/css/style.css" rel="stylesheet" media="all" type="text/css">
<script type="text/javascript" language="javascript" src="libraries/jquery/jquery.js"></script>
<script type="text/javascript" language="javascript" src="libraries/jquery/jquery.dataTables.min.js"></script>
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
	$('#mytable').dataTable( {
                "bJQueryUI": true,
	        "oLanguage": {
			"sUrl": "table/language/dataTables.french.txt"
			     },
                "sPaginationType": "full_numbers",
                "aoColumns": [
                              {"bSortable": true},
                              {"bSortable": false},
                              null,
                              null
                             ]
	} );
} );
</script>
<table id="mytable" class="display"> 
<thead>
<tr>
<th class="border-left">#</th>
<th>Ecouter</th>
<th>Nom</th>
<th class="border-right">Date</th>
</tr>
</thead>
<tbody>
<tr class="border-top">
<td>1</td>
<td>xxxxxxxxxxxxxxxxxxxxxxxxxx</td>
<td>xxxxxxxxxxxxxxxxxxxxxxxxxx</td>
<td>01/09/2010</td>
</tr>

What I have to add for sorting date and where ?

In advance thanks,

JD