What's wrong with the help page layout?

<%@ Page language="C #"autoeventwireup="true"Codebehind="MainForm.aspx.cs"inherits="Webext.mainform"%><! DOCTYPE HTML Public"-//W3C//DTD XHTML 1.0 transitional//en" "HTTP://WWW.W3.ORG/TR/XHTML1/DTD/XHTML1-TRANSITIONAL.DTD">"http://www.w3.org/1999/xhtml">"Server"> <title> Management Systems </title>"Form1"runat="Server"> <div> <ext:resourcemanager id="ResourceManager1"runat="Server"> </ext:ResourceManager> <ext:viewport id="Viewport"runat="Server"layout="BorderLayout"> <Items> <ext:panel runat="Server"region="West"title="Catalogue"Minwidth=" $"Border="true"split="true"> <Items> <ext:treepanel runat="Server"Id="TreePanel1"> <Root> <ext:node text="Menu"Nodeid="Root"Expanded="false"> </ext:Node> </Root> <Store> <ext:treestore runat="Server"> <Proxy> <ext:ajaxproxy url="/tree-handler.ashx"> </ext:AjaxProxy> </Proxy> </ext:TreeStore> </Store> </ext :treepanel> </Items> </ext:Panel> <ext:panel runat="Server"region="Center"title="Home Page"Border="true"split="true"> </ext:Panel> </Items> </ext:Viewport> </div> </form ></body>
The layout turns into just one line, which adds a treeplane to the plane.
What's wrong with the help page layout?