My loading panel not shown up when click the linkbutton.Please help Thanks.
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="lnkDownload"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="lnkDownload" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings> </telerik:RadAjaxManager>
<telerik:GridTemplateColumn FilterControlAltText="Filter TemplateColumn column" HeaderText="Description"
UniqueName="TemplateColumn" SortExpression="Description">
<ItemTemplate>
<asp:Panel ID="pnlContent" runat="server">
<asp:LinkButton ID="lnkDownload" Text='<%# Bind("Description") %>' runat="server"
OnClick="lnkDownload_Click"></asp:LinkButton>
</asp:Panel>
</ItemTemplate>
<ItemStyle HorizontalAlign="Left" />
</telerik:GridTemplateColumn>