jQuery Grid Plugin - jqGrid

Hi,

I'm using the jqgrid addind the pager to navigate in the info, the problem is that when I select in the dropdownlist the number of registers I want to show it update the grid but when I want no navigate using the navigation arrows the content aren't changed, there are some special property I  have to set to have this feature.

There is the code I'm using for the grid:

jQuery(”#informesTable”).jqGrid({
              url: 'showInfo.php',
              datatype: 'json',
              width:850,
              height:'auto',
              mtype: 'GET',
              colNames: ['Id', xxx', 'xxx', 'xxx', 'xxx', 'xxx' , 'xxx' , 'xxx'],
              colModel: [
                            { name: 'Id', index: 'Id', width: 40,hidden:true, align: 'left', editable:false},
                            { name: 'xxx', index: 'xxx', width: 120,align: 'left', editable:false},
                            { name: 'xxx', index: 'xxx', width: 40,align: 'left', editable:false},
                            { name: 'xxx',index:'xxx', width: 130,editable: false},
                            { name: 'xxx',index:'xxx', width: 130,editable: false},
                            { name: 'xxx',index:'xxx', width: 150,editable: false},
                            { name: 'xxx',index:'xxx', width: 100,editable: false},
                            { name: 'xxx',index:'xxx', width: 80,editable: false}
                         ],
              pager: jQuery('#pager'),
              rowNum: 10,
              rowList: [10, 15, 30, 50],
              sortname: “ID”,
              sortorder: “desc”,
              loadonce: true,
              multiselect: true,
              viewrecords: true,
              editurl: 'EditData.php',  
              imgpath: '/content/images',
              caption: 'Infol'
          });
         
        jQuery(”#pager”).jqGrid('navGrid',”#pager”,{edit:false,add:false,del:false});