Hello:

I have read through all of the postings and tried it all...even with the code posted on the forum as 'Working'.

I am using an aspx page with Masterpage, and no matter what I do, it does not fire the code-behind.
I am also using Infragistics version 13.1, so I am up to date, and with VS2010.

Any suggestions?

<asp:UpdatePanel ID="uplLeftClientNav" runat="server" >

<ContentTemplate>

<div id="col1">

    <ig:WebDataTree ID="wdtLeftNav" runat="server" Font-Size="Small" Height="300px"

     Width="200px" AutoPostBackFlags-NodeClick="On" OnNodeClick="wdtLeftNav_NodeClick" >

<Nodes>

    <ig:DataTreeNode Text="Client Management">

     <Nodes>

                             <ig:DataTreeNode Key="New Client" Text="Add New Client">                   

              </ig:DataTreeNode>

         </Nodes>

         </ig:DataTreeNode>

</Nodes>

</ig:WebDataTree>

  </div>

 <div id="col2outer">

<div id="divUserControl" runat="server"> </div>

</div>

</ContentTemplate>

<Triggers>

<asp:AsyncPostBackTrigger ControlID="wdtLeftNav" EventName="NodeClick" />

</Triggers>

</asp:UpdatePanel>

Code-behind:

Protected Sub wdtLeftNav_NodeClick(sender As Object, e As Infragistics.Web.UI.NavigationControls.DataTreeNodeClickEventArgs) Handles wdtLeftNav.NodeClick

   If e.Node.Key = "New Client" Then

            divUserControl.Controls.Clear()

            divUserControl.Controls.Add(Page.LoadControl("~/uc/NewClient.ascx"))

End If