Why border of tfoot tr:first-child not showing in IE. I'm checking in IE7.
font-weight:bold; background:yellow is showing in IE but border not
table {
    border-collapse: collapse;
    border-spacing: 0;
}
table tfoot tr:first-child {
    font-weight:bold;
    background:yellow;
    border-top:2px solid red; 
    border-bottom:2px solid red;
}
HTML
<table cellpadding="0" cellspacing="0">
 <thead>
  <tr>
   <th align="left" scope="col">XXXX</th>
   <th align="right" scope="col">XXXX</th>
   <th align="right" scope="col">XXXX</th>
   <th align="right" scope="col">XXXX</th>
  </tr>
 </thead>
  <tfoot>
  <tr>
   <td colspan="3">XXXX</td>
   <td align="right">XXX</td>
  </tr>
   <tr>
   <td colspan="4">XXX</td>
   </tr>
 </tfoot>
 <tbody>
  <tr>
   <td align="left">XXXX</td>
   <td align="right">XXXX</td>
   <td align="right">XXXX</td>
   <td align="right">XXXX</td>
  </tr>
 </tbody>
</table>
update:
i'm using this doctype
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">