ASP.NET AJAX Accordion UpdatePanel

[rsdev]

Hi,

I am new to implementing Asynchronous javascript in asp.net (or any framework) and have come across a problem.

In a user control I have an accordion with a nested updatepanel, the trigger is a link button in the header. I have read several posts that suggest I need to add the ControlID in the codebehind, so I have and I don't get any errors, but also there's nothing loading into the updatepanel.

Here's the code;

Codebehind:

 protected void Page_Init(object sender, EventArgs e)
    {
        LinkButton UserLink = Accordion1.FindControl("UserLink") as LinkButton;
        ScriptManager.GetCurrent(this.Page).RegisterAsyncPostBackControl(UserLink);
        //Creates a new async trigger
        AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();

        //Sets the control that will trigger a post-back on the UpdatePanel
        trigger.ControlID = "UserLink";

        //Sets the event name of the control
        trigger.EventName = "Click";

        //Adds the trigger to the UpdatePanels' triggers collection
        UpdatePanelUser.Triggers.Add(trigger);
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void UserLink_Click(object sender, EventArgs e)
    {
        String userPanelPath = "~/CMS/_admin/_components/CMS_controls/admin_controls/UserPanel.ascx";
        Control userPanel = Page.LoadControl(userPanelPath);
        PanelUser.Controls.Add(userPanel);
    }

apsx page:

<ajaxToolkit:Accordion ID="Accordion1" runat="server" HeaderSelectedCssClass="AdminPanelHeaderSelected" RequireOpenedPane="false" SuppressHeaderPostbacks="true" SelectedIndex="0" HeaderCssClass="AdminPanelHeader" ContentCssClass="AdminPanelContent" FadeTransitions="true" FramesPerSecond="40" TransitionDuration="250" AutoSize="none">
            <Panes>
                <ajaxToolkit:AccordionPane runat="server" ID="Home" >
                    <Header>
                        <a href="" onclick="return false;">Home</a>
                    </Header>
                    <Content>
                    </Content>
                </ajaxToolkit:AccordionPane>
                <ajaxToolkit:AccordionPane runat="server" ID="UserPanel">
                    <Header>
                         <asp:LinkButton ID="UserLink" runat="server">User panel</asp:LinkButton>
                    </Header>
                    <Content>
                        <asp:UpdatePanel ID="UpdatePanelUser" runat="server" UpdateMode="Conditional">
                            <ContentTemplate>
                                <asp:Panel ID="PanelUser" runat="server">
                                </asp:Panel>
                            </ContentTemplate>
                            
                        </asp:UpdatePanel>
                    </Content>
                </ajaxToolkit:AccordionPane>
                <ajaxToolkit:AccordionPane runat="server" ID="STATS">
                <Header>
                        <a href="" onclick="return false;">Statistics</a>
                    </Header>
                    <Content>
                    </Content>
                </ajaxToolkit:AccordionPane>
                <ajaxToolkit:AccordionPane runat="server" ID="GroupEmails">
                <Header>
                        <a href="" onclick="return false;">Group Email</a>
                    </Header>
                    <Content>
                    </Content>
                </ajaxToolkit:AccordionPane>
                <ajaxToolkit:AccordionPane runat="server" ID="Errors">
                <Header>
                        <a href="" onclick="return false;">Error reporting</a>
                    </Header>
                    <Content>
                    </Content>
                </ajaxToolkit:AccordionPane>
            </Panes>
            </ajaxToolkit:Accordion>

Any help would be appreciated.