jQuery Grid Plugin - jqGrid

Hello,

i m using this so good plugins !

and i have a little problem, but i can't found how do this :

i have a php files with this XML creation files :

...

while($row = mysql_fetch_array($result,MYSQL_ASSOC)) {
    $i = $i+1;
    $tab_final = calculTPS($row['DATE_DEBUT'],$row['DATE_FIN']);
    //pour le calcul du tps jour, nuit et dimanche
    $piecesDebut = explodeDate( $row['DATE_DEBUT']);
    $piecesFin = explodeDate($row['DATE_FIN']);
    $nom_prenom = $row['NOM_EMP'].' '.$row['PRENOM_EMP'];
    $s .= "<row id='". $row['NUM_MISSION']."'>";
    $s .= "<cell>". $row['NOM_CLIENT']."</cell>";
    $s .= "<cell>". $row['NOM_MISSION']."</cell>";
    $s .= "<cell>". $piecesDebut[0]."</cell>";//date début
    $s .= "<cell>". $piecesDebut[1]."</cell>";//horraire début
    $s .= "<cell>". $piecesFin[0] ."</cell>";//date fin
    $s .= "<cell>". $piecesFin[1]."</cell>";//horraire fin
    $s .= "<cell>". $tab_final[tps_total]."</cell>"; //tps total
    $s .= "<cell>". $tab_final[tps_jour]."</cell>"; //temps jour
    //$total_tps_jour = $tab_final[tps_totaljour] + $total_tps_jour;
    $s .= "<cell>". $tab_final[tps_nuits]."</cell>"; //temps nuit
    $s .= "<cell>". $tab_final[tps_dimJour]."</cell>";//temps dimanche jour
    $s .= "<cell>". $tab_final[tps_dimNuit]."</cell>";//temps dimanche nit
    $s .= "<cell>". $nom_prenom."</cell>";// nbr employé sur missions
    $s .= "<cell>". $row['ADRESSE_MISSION']."</cell>";
    $s .= "<cell>". $row['VILLE_MISSION']."</cell>";
    $s .= "<cell>". $row['CODE_POSTALE_VILLE']."</cell>";
    $s .= "<cell>". $row['NUM_MISSION']."</cell>";
    $s .= "</row>";
}

$s .= "<userdata>";
   
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";/
    $s .= "<cell></cell>";
    $s .= "<cell> </cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell>".afficheHeure($total_tps_jour)."</cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    $s .= "<cell></cell>";
    
    $s .= "</userdata>";
$s .= "</rows>";
echo $s;

and i have this for jqgrid code :

        jQuery("#list").jqGrid({
            edit : {
                addCaption: "Add Record",
                editCaption: "Edit Record",
                bSubmit: "Submit",
                bCancel: "Cancel",
                bClose: "Close",
                saveData: "Data has been changed! Save changes?",
                bYes : "Yes",
                bNo : "No",
                bExit : "Cancel"
            },
            url:'modeles/tab_mission.php',
            datatype: 'xml',
            mtype: 'GET',
            colNames:['CLIENT','MISSION','DATE_DEBUT','HEURE_DEBUT','DATE_FIN','HEURE_FIN',
                'TPS_TOTAL','TPS_JOUR','TPS_NUIT','DIM_JOUR','DIM_NUIT','Nom EMPLOYE','ADR','VILLE','CODE_POSTALE_VILLE','NUM_MISSION'],
            colModel :[

                {name:'NOM_CLIENT',index:'NOM_CLIENT',width:70, editable: true, edittype:"select", editoptions:{dataUrl:'modules/mission/list_clients.php'}, formoptions:{ label: "Client",rowpos:1,elmprefix:"&nbsp;&nbsp;&nbsp;&nbsp;" } },
                {name:'NOM_MISSION',index:'NOM_MISSION', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:2, label: "Nom mission", elmprefix:"(*)"},editrules:{required:true}},
                {name:'DATE_DEBUT',index:'DATE_DEBUT', width:80, editable:true, editoptions:{size:12, dataInit:function(el){ $(el).datepicker({dateFormat:'yy-mm-dd'}); }, defaultValue: function(){ var currentTime = new Date(); var month = parseInt(currentTime.getMonth() + 1); month = month <= 9 ? "0"+month : month; var day = currentTime.getDate(); day = day <= 9 ? "0"+day : day; var year = currentTime.getFullYear(); return year+"-"+month + "-"+day; } }, formoptions:{ rowpos:3, elmprefix:"(*)",elmsuffix:" yyyy-mm-dd" }, editrules:{required:true} },
                {name:'HEURE_DEBUT',index:'HEURE_DEBUT', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:4, label: "Heure debut format XX:XX", elmprefix:"(*)"},editrules:{required:true}},
                {name:'DATE_FIN',index:'DATE_FIN', width:80, editable:true, editoptions:{size:12, dataInit:function(el){ $(el).datepicker({dateFormat:'yy-mm-dd'}); }, defaultValue: function(){ var currentTime = new Date(); var month = parseInt(currentTime.getMonth() + 1); month = month <= 9 ? "0"+month : month; var day = currentTime.getDate(); day = day <= 9 ? "0"+day : day; var year = currentTime.getFullYear(); return year+"-"+month + "-"+day; } }, formoptions:{ rowpos:5, elmprefix:"(*)",elmsuffix:" yyyy-mm-dd" }, editrules:{required:true} },
                {name:'HEURE_FIN',index:'HEURE_FIN', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:6, label: "Heure fin format XX:XX", elmprefix:"(*)"},editrules:{required:true}},
                {name:'TPS_TOTAL',index:'TPS_TOTAL', width:90,editable:false},
                {name:'TPS_JOUR',index:'TPS_JOUR', width:90,editable:false},
                {name:'TPS_NUIT',index:'TPS_NUIT', width:90,editable:false},
                {name:'TPS_DIM_JOUR',index:'TPS_DIM_JOUR', width:90,editable:false},
                {name:'TPS_DIM_NUIT',index:'TPS_DIM_NUIT', width:90,editable:false},
                {name:'Nom_EMPLOYE',index:'Nom_EMPLOYE',width:170, editable: true, edittype:"select", editoptions:{dataUrl:'modules/mission/list_employes.php'}, formoptions:{ label: "Employe",rowpos:7,elmprefix:"&nbsp;&nbsp;&nbsp;&nbsp;" } },
                {name:'ADRESSE',index:'ADRESSE_MISSION', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:8, label: "Adresse", elmprefix:"(*)"},editrules:{required:true}},
                {name:'VILLE',index:'VILLE_MISSION', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:9, label: "Ville", elmprefix:"(*)"},editrules:{required:true}},
                {name:'CODE_POSTALE_VILLE',index:'CODE_POSTALE_VILLE', width:90,editable:true,editoptions:{size:25}, formoptions:{ rowpos:10, label: "Code postal", elmprefix:"(*)"},editrules:{required:true}},
                {name:'NUM_MISSION',index:'NUM_MISSION', width:0,editable:false},

            ],
            pager: '#pager',
            rowNum:10,
            autowidth: true,
            rowList:[10,20,30],
            pager: jQuery('#pager'),
            sortname: 'NUM_MISSION',
            sortorder: 'desc',
            viewrecords: true,
            caption: 'Les missions',
            footerrow : true,
            userDataOnFooter : true,
          
            editurl:"modules/mission/ajout_mission.php"
        }).navGrid('#pager',
        {view:true}
    );

and wih this i can see my userdata on the summer footer of my jqgrid table, please where is the problem?

because on the demonstration have anexemple with json, but my web server don't have json function, so ican use only XML, please help, thanks.