Merhaba arkadaşlar mevcut sitemapımı google sitemap şeklinde uyarlamaya calısıyorum ama olmuyor sizce nerede hata yapıyorum

Mevcut Sitemap Kodlarım

<?php
include "genels.php"; 
header("Content-type: text/xml\n\n");
echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>
<rss version=\"2.0\">";
echo " <channel>
<title>$site_title</title>
<link>$sa</link> 
<description>$site_desc</description>
<language>tr-TR</language>
<copyright>Copyright (C) 2012</copyright>
";
$yazilar = mysql_query("SELECT * FROM _haberler where durum='true' order by id desc limit 30 "); 
while($yazi = mysql_fetch_assoc($yazilar)) { 
$link = "".$sa."/haber-".$yazi[id]."-".tr($yazi[baslik]).".html"; 
$imaj = "".$sa."/dev/qinternet/images/haber/k_imaj/".$yazi['imaj'].""; 
$pubDate =date("r", strtotime($yazi['tarih']));
$yazar = $yazi['yazar'];
$kat_ad = $yazi['kat_ad'];
echo " 
<item> 
<title>$yazi[baslik]</title> 
<description><![CDATA[$yazi[kisa_yazi]]]></description>
<link>$link</link> 
<pubDate>$pubDate</pubDate>
<category>
<![CDATA[ $yazi[kat_ad] ]]>
</category>
</item> 
"; 
} 
echo " 
</channel> 
</rss>"; 
?>

Yapmaya Çalıştıgım Google sitemap kodlarım

<?php
include "genels.php"; 
header("Content-type: text/xml\n\n");
echo '<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:news="http://www.google.com/schemas/sitemap-news/0.9">';

$yazilar = mysql_query("SELECT * FROM _haberler where durum='true' order by id desc limit 30 "); 
while($yazi = mysql_fetch_assoc($yazilar)) { 
$link = "".$sa."/haber-".$yazi[id]."-".tr($yazi[baslik]).".html"; 
$imaj = "".$sa."/dev/qinternet/images/haber/k_imaj/".$yazi['imaj'].""; 
$pubDate =date("r", strtotime($yazi['tarih']));
$yazar = $yazi['yazar'];
$kat_ad = $yazi['kat_ad'];
echo ' <url>
    <loc>$link</loc>
    <news:news>
      <news:publication>
        <news:name>$yazi[baslik]</news:name>
        <news:language>tr</news:language>
      </news:publication>
      <news:access>$yazi[kisa_yazi]</news:access>
      <news:genres>$yazi[kat_ad]</news:genres>
      <news:publication_date>$pubDate</news:publication_date>
      <news:title>$yazi[baslik]</news:title>
      <news:keywords>$yazi[etiketler]</news:keywords>
      <news:stock_tickers>NASDAQ:A, NASDAQ:B</news:stock_tickers>
    </news:news>
  </url>';

} 
echo "</urlset>"; 
?>