Sitemap Oluştururken XML Hatası veriyor.

<?php 
include('ayarlar.php'); 
header('Content-type: text/xml'); 
echo '<?xml version="1.0" encoding="UTF-8"?>'."\n"; 
echo '<!-- generated-on="'.date("d M Y H:i").'" -->'."\n".'<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'."\n"; 
echo "<urlset>"; 
$sql = mysql_query("Select * from sarki_sozleri order by RAND() LIMIT 200"); 
while($r1= @mysql_fetch_array($sql)) { 
?> 
<url> 
    <loc><?=$url;?>/sarki-sozleri/<?=$r1[baslik_seo];?>/</loc> 
    <lastmod><?=$r1[tarih];?></lastmod> 
    <changefreq>always</changefreq> 
    <priority>0.9</priority> 
</url> 
<? } echo '</urlset>'; ?>