Listed below is my tree,  I am trying to link the tree such that when a node is clicked in the tree, the server creates a new web tab(loaded with an acsx control) and populates a new Tab into the WebTab.  All done without any postbacks...The code behind for the click event does not seem to occur at all when using breakpoints and the debugger.

<ig:WebDataTree ID="WebDataTree9" runat="server" DataSourceID="TreeDataSource" InitialExpandDepth="1"
                                        Style="float: left" EnableConnectorLines="True" StyleSetName="Office2007Blue"
                                        EnableAjax="true" EnableHotTracking="true" SelectionType="Single" onnodeclick="WebDataTree9_NodeClick" Height="413px" 
                                        Width="285px" AutoPostBackFlags-SelectionChanged="Async">                                        
                                        <DataBindings>
                                            <ig:DataTreeNodeBinding DataMember="Item" TextField="Text" ValueField="Text" ImageUrlField="ImageUrl" />
                                        </DataBindings>
                                    </ig:WebDataTree>
 
<ig:WebTab ID="WebTab1" runat="server" Height="800px" Width="860px" TabOrientation="Horizontal" TabLocation="TopLeft" SelectedIndex="0" EnableActivation="true" StyleSetName="Office2007Blue">  
            <AddNewTabItem Enabled="true" TextForNewTab="Untitled" EnableTextEditingOnDoubleClick="true" />  
            <CloseButton Enabled="true" /> 
            <PostBackOptions EnableLoadOnDemandUrl="true" />                    

            <Tabs>
                <ig:ContentTabItem runat="server" Text="Tab 1">
                    <Template>
                        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
                    </Template>                    
                </ig:ContentTabItem>
            </Tabs>
        </ig:WebTab>

C#

protected void WebDataTree9_NodeClick(object sender, DataTreeNodeClickEventArgs e)
        {
            ContentTabItem Tab = new ContentTabItem();
            //Tab.ContentUrl = "~/Customer.acsx";
            Tab.ContentUrl = "http://www.google.com";
            WebTab1.Tabs.Add(Tab);
        }