DataTables TableTools plugin - How to configure sSwfPath path in Codeigniter ?

Hi I have given my code in JSBin http://live.datatables.net/aqowib/2 for which I am not able to link to the sSwfPath properly. I am using codeiginter in my application so I am trying to load the files as follows:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> 
<script src="http://<?php base_url(); ?>/assets/js/jquery.dataTables.js" type="text/javascript"></script>
<script src="http://<?php base_url(); ?>/js/jquery.dataTables.columnFilter.js" type="text/javascript"></script>
<script src="http://<?php base_url(); ?>/media/js/ZeroClipboard.js" type="text/javascript"></script>
<script src="http://<?php base_url(); ?>/media/js/TableTools.js" type="text/javascript"></script>

And my script tag contains the following code:

$(document).ready(function(){
	var oTable = $('#datatables').dataTable({
		"sPaginationType":"full_numbers",
		"sDom": 'Tlfrtip',
		"oTableTools": {
			"sSwfPath": "<?php base_url();?>/media/swf/copy_cvs_xls_pdf.swf"
		},
		"sScrollX": "100%",
		"bScrollCollapse": true,
		"bAutoWidth": true,
		"aaSorting":[[0, "asc"]],
		"bJQueryUI":true
	}).columnFilter({
		aoColumns: [ null,
					 null,
					 { type: "select", values: [ 'male', 'female']  },
					 null,
					 null,
					 null,
					 null,
					 { type: "select", values: [ '1', '2', '3', '4', '5', '6', '7','8','9','10']  },
					 { type: "select", values: [ 'A', 'B', 'C']  },
					 null,
					 { type: "select", values: ['P', 'A'] },
					 null,
					 null,
					 null
			]
	});
});

Everytime I am getting the 404 error saying that

Unable to load SWF file - please check the SWF path

Please help me where am I wrong ?
Thanks in advance.