I have a Sitefinity Widget on a page with a template that is a custom master page.  The updated control is buried insite a MultiView.  The Ajax request seems to work fine, but my loading panel does not appear.  I've tried attaching ResponseEnd and RequestStart events, but they don't fire either.  I've read a large number for forum posts on people having trouble getting RadAjaxLoadingPanels to appear, but none of these solutions have worked for me.  Is there anything else I can try?

Thanks.

In page.master for the custom template:
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>

<telerik:RadAjaxManager ID="RadAjaxManager1"   runat="server">
</telerik:RadAjaxManager>

In Sitefinity Widget .aspx:
   <telerik:RadAjaxManagerProxy ID="RadAjaxManagerProxy1" runat="server"> 
        <AjaxSettings>
            <telerik:AjaxSetting AjaxControlID="HomeFilterPanel1">
                <UpdatedControls>
                    <telerik:AjaxUpdatedControl ControlID="RadListViewHomesPanel" LoadingPanelID="MyLoadingPanel" />
                </UpdatedControls>
            </telerik:AjaxSetting>
        </AjaxSettings>
    </telerik:RadAjaxManagerProxy>

    <telerik:RadAjaxLoadingPanel ID="MyLoadingPanel"  ClientIDMode="Static" runat="server" MinDisplayTime="2000"  Skin="Default"  Visible="true">
    <asp:Label ID="Label2" runat="server" ForeColor="Red">Loading... </asp:Label>

 <%-- <asp:Image ID="Image1" runat="server" Width="224px" Height="48px" ImageUrl="~/Loading.gif" />--%>
</telerik:RadAjaxLoadingPanel>

        <telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
            <script type="text/javascript">
                function RequestStart(sender, args) {
                    alert('RequestStart');
                }

                function ResponseEnd() {
                    alert('ResponseEnd');
                }
            </script>
        </telerik:RadScriptBlock>

In Sitefinity Widget .cs:
        protected void Page_Load(object sender, EventArgs e)
        {
            RadAjaxManager manager = RadAjaxManager.GetCurrent(this.Page);
            if (manager != null)
            {
                manager.ClientEvents.OnRequestStart = "RequestStart";
               manager.ClientEvents.OnResponseEnd = "ResponseEnd";         
            }

            RadAjaxManager.GetCurrent(Page).AjaxSettings.AddAjaxSetting(RadAjaxManager.GetCurrent(Page), RadListViewHomesPanel, this.MyLoadingPanel);

        }