sortName not working !

[splat1985]

Simply write the following code but it does not work. Why might that be?

Code:

$("#stokGrid").datagrid({
            loadMsg:'Yukleniyor lutfen bekleyin !',
            remoteSort: false,

            sortName:'sto_isim',
            sortOrder:'asc',

            rowStyler : function(index,row){
.....