outputting xml from php using html namespace

[TomCat]

Hi,

I'm hoping someone can help me out.
(example using php 5.1.4 and firefox 1.5.0.7)

I am creating an xml document on the fly and trying to output it in a browser using xsltprocessor

The output is:
<?xml version="1.0"?>
<h:html xmlns:h="http://www.w3.org/1999/xhtml">
<h:head>
<h:title>TESTING</h:title>
</h:head>

<h:body>
<h:table width="100%" border="2">
<h:tr bgcolor="silver" id="table_head">
<h:th>Name</h:th><h:th>Description</h:th>
</h:tr>
<h:tr id="table_body">
<h:td>DOG</h:td>
<h:td>Loxley type of user</h:td>
</h:tr>
<h:tr id="table_body">
<h:td>admin</h:td>
<h:td>System administrator</h:td>
</h:tr>
</h:table>
</h:body>
</h:html>

which is just what I wanted

The problem is when it is echoed to the browser I just get a string of text.

If i copy the source into either a .xml or .xhtml file it works but only in firefox not in i.e.

Can anyone please help me - am i missing something?