This is now the aspx page content and I get the "The callback on ctl04 has failed because the server did not recognise this callback and processed it as a normal request ...."
This was returned after clicking on the node to load "on demand". Have I missed something here? The codebehind is creating all of the nodes from code.
Nick
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="tree.aspx.cs" Inherits="tree" %>
<%@ Register TagPrefix="eo" NameSpace="EO.Web" Assembly="EO.Web" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script src="javascript/TreeviewSupport.js" type="text/javascript"></script>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<eo:TreeView ID="eoTreeView" runat="server" AllowDragDrop="True" ClientSideOnDragDrop="drop_handler" RaisesServerEvent="true"
ControlSkinID="MSDN"
onitempopulate="eoTreeView_ItemPopulate"
onitemmoved="eoTreeView_ItemMoved" onitemclick="eoTreeView_ItemClick"
onitemrenamed="eoTreeView_ItemRenamed" >
<LookNodes>
<eo:TreeNode ItemID="_Default">
</eo:TreeNode>
</LookNodes>
<TopGroup AllowDrag="True" AllowDrop="True">
<Nodes>
</Nodes>
</TopGroup>
</eo:TreeView>
</ContentTemplate>
</asp:UpdatePanel>
</div>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="save" />
<asp:Literal ID="litMsg" runat="server"></asp:Literal>
</form>
</body>
</html>