php+wml 电脑浏览器显示全部乱码

<?php
    //自定义文件
    require("common/Inc/conn.inc.php");
conndb();
$root="D:/www/htdocs/";
require("function.php");
$title="东北高师就业联盟网手机版";
    //输出wml头文件
    //Header("Content-type: text/vnd.wap.wml");
    //Header("Cache-Control: no-cache, must-revalidate");
    //Header("Pragma: no-cache");
    echo ("<?xml version='1.0' encoding='utf-8' charset='utf-8'?>");
    echo ("<!DOCTYPE wml PUBLIC '-//WAPFORUM//DTD WML 1.1//EN' 'http://www.wapforum.org/DTD/wml_1.1.xml'>");
    echo ("<wml>");
?>网站在wap.dsjyw.net
求救啊！！怎么会在电脑浏览器上乱码呢