Web.Sitemap, problem with roles..

<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http:// schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
    <siteMapNode url="~/." title="Home"  description="Home Tab" roles="*">
   
  <siteMapNode url="" title="Time Cards"  description="Time Cards" roles="HR" >
   <siteMapNode url="~/TimeCards.aspx?p=1" title="Time Cards"  description="Employee Time Cards" roles="HRM, Domain Users" />
  </siteMapNode>
  <siteMapNode url="~/Mileage.aspx" title="Mileage" description="Mileage" roles="HR" />
   
  <siteMapNode url="~/Emergency.aspx" title="Emergency" description="Emergency" roles="HR" >
   <siteMapNode url="~/Emergency.aspx?p=1" title="Emergency" description="Emergency" roles="HR" />
  </siteMapNode>
    ...