What is wrong with this Web.Sitemap ?

The VS2008 undelined and said something wrong with the 3rd line. I really can't tell what goes wrong. Pls help.... thanks
 
<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
  <SiteMapNode Title=" Home" >
    <SiteMapNode Title=" A" Url="~/A.aspx"/>
    <SiteMapNode Title=" B" Url="~/B.aspx"/>
    <SiteMapNode Title=" C" Url="~/C.aspx"/>
    </SiteMapNode>
</siteMap>
...