[Solved] PanelBar but does not expand the child

[Hernando]

good day!
I have a PanelBar but does not expand the child, I wonder why is not working, thanks.

<%= Html.Telerik().PanelBar()
             .Name("menuGeneral")
             .ExpandMode((PanelBarExpandMode)Enum.Parse(typeof(PanelBarExpandMode), PanelBarExpandMode.Single.ToString()))
             .BindTo((IEnumerable<Nomina.Models.menuAplicacion>)ViewData["menu"], mappings =>
             {

                 mappings.For<Nomina.Models.menuAplicacion>(binding => binding
                   .ItemDataBound((item, itm) =>
                   {
                       item.Text = itm.descripcion;
                       item.ImageUrl = Url.Content(itm.icono);
                       item.ImageHtmlAttributes.Add("style", "margin-right: 10px");
                   })

                    .Children(itm => Nomina.Models.itemsAplicacion.listaItems(itm.idmenu)));
                       mappings.For<Nomina.Models.itemsAplicacion>(binding => binding
                           .ItemDataBound((item, product) =>
                        { item.Text = product.descripcion; }));


             })
%>

[Sri]

Is there any solution for this? It doesn't work in MVC!!!