i have an xml that is being updated on popluate on demand event,
and i wat to do databind on the new xml,
but the new nodes do not apeer on the tree,


using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
public partial class _Default : System.Web.UI.Page
{

private string xml = "<xml><test title=\"open\"></test></xml>";
protected void TreeView1_Init(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
XmlDataSource xmlSource = new XmlDataSource();
xmlSource.EnableCaching = false;
xmlSource.Data = xml;
xmlSource.XPath = "/*/*";
TreeView1.DataSource = xmlSource;
TreeView1.DataBind();
}

}

protected void TreeView1_ItemDataBound(object sender, EO.Web.NavigationItemEventArgs e)
{
e.TreeNode.PopulateOnDemand = true;
}

protected void TreeView1_ItemPopulate(object sender, EO.Web.NavigationItemEventArgs e)
{
xml = "<xml><test title=\"open\"><sub title=\"sub\"></sub></test></xml>";
XmlDataSource xmlSource = new XmlDataSource();
xmlSource.EnableCaching = false;
xmlSource.Data = xml;
xmlSource.XPath = "/*/*";
TreeView1.DataSource = xmlSource;
TreeView1.DataBind();
}


}