I try open the file of xhtml using Openwave 7 simulator, its shows "406 Not Accepts" ERROR, anyone know why? I have try it in Nokia simular, it's work !

Do I miss any setting ?

<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<title>Phillip Securities Group</title>

<h2>Main Menu</h2>
<li><a href="quote.xhtml">Place Order</a></li>
<li><a href="details.xhtml">Order Details</a></li>
<li><a href="balance.xhtml">Check Position</a></li>
<li>sign Out</li>