XLS CSV PDF not working

$('#example').dataTable({
                            "bProcessing": true,
                            "sAjaxSource":"./history",
                            "bDestroy": true,
                            "sDom": 'T<"clear"><"H"lfr>t<"F"ip>',
                            "oTableTools": {
                                //"sSwfPath": "http://cdn.datatables.net/tabletools/2.2.2/swf/copy_csv_xls_pdf.swf",
                                "sSwfPath": "resources/media/copy_csv_xls_pdf.swf",
                            
                               
                            },    
                            "fnServerData": function ( sSource, aoData, fnCallback ) {
                                $.ajax( {
                                    "dataType": 'json', 
                                    "type": "POST", 
                                    "url": sSource, 
                                    "data": aoData, 
                                    "success": fnCallback
                                } );
                            },
                            "aoColumns": [
                                          {"sTitle" : "Issue Logged", "mData": "issueLogged" },
                                          {"sTitle" : "Agent Name", "mData": "agent" },
                                          {"sTitle" : "Branch Code", "mData": "brcode" },
                                          {"sTitle" : "Branch Name", "mData": "brname" },
                                          {"sTitle" : "State", "mData": "state" },
                                          {"sTitle" : "Category Complaint", "mData": "Category" },
                                          {"sTitle" : "Priority", "mData": "priority" }
                                      ],
                                      
                      });