jQuery Grid Plugin - jqGrid

Hi Tony

I have a problem to jump to the next page.

My "url" in the Grid is

"url:"seteos.ashx?accion=leerJSON&campo=descr_campo_1&valorCampo=''&cantidadRegistros=" + nroRenglones + "&pagina=" + paginaActual + "&totalRegistros=" + totalRegistros"

paginaActual = 1 and in server i read "pagina=1" and return

{page:"1",total:"2",records:"18",rows:[{id:"59", cell:["59","Acoyte 25 - 4 K","Capital","1405","","4902-1925",'']},{id:"62", cell:["62","Arieta 2205","San Justo","1254","","",'']},{id:"61", cell:["61","Arieta 2353","San Justo","1725","","4653-3234",'']},{id:"63", cell:["63","Av. Independencia 2353","Capital","","","4322-4255",'']},{id:"65", cell:["65","Av. La Plata 234","Capital","1424","","",'']},{id:"64", cell:["64","Av. Rivadavia 4995 - Local 25","Capital","1405","","4902-1882",'']},{id:"60", cell:["60","Camargo 774","Capital","Capital","","4854-6123",'']},{id:"45", cell:["45","Corrientes 5525 - 6 '43'","Capital","1414","","",'']},{id:"57", cell:["57","J. B. Justo 1235","Capital","1414","","4854-5323",'']},{id:"56", cell:["56","l. de la torre 1234","Lomas del Mirador","","Bs. As.","4436-4600//312*5555",'']}]}

this is my first page and it's ok.

but, when I touch the button next, my code is this

onPaging: function(que) {
                        switch(que) {
                            case "next":
                                if (paginaActual < cantidadPaginas) {
                                      paginaActual += 1;
                                      $("#Grilla").setGridParam({postData: { pagina: 2 }});
                                }
                                break;
                            case "prev":
                                break;
                            case "first":
                                break;
                            case "last":
                                break;
                        }
                        $("#Grilla").trigger("reloadGrid");

                      }
        }).navGrid('#pagerGrilla',{view:false,edit:false,add:false,del:false,search:false, refresh:false});

When i read in server the variable pagina receive "1,2" instead of receiving "2".

Since I do to receive 2 in the server?

Thanks in advance

Victor