Hi people!

I have the following problem, in the preview I only see those text in the right...
And, I don't know how can I see that in live mode.. I mean, the path (link), for example:
www.example.com/firstFolder/sitemap_xml
www.example.com/firstFolder/sitemap_xml.php
www.example.com/firstFolder/sitemap_xml.xml
don't work...
Thanks.
More Details:
Server version: 5.2.200607.79090 (I)
Template content:
<CMS_HEADER>
<CMS_FUNCTION name="Navigation" resultname="sitemap">
<CMS_PARAM name="expansionVisibility" value="all"/>
<CMS_PARAM name="wholePathSelected" value="0"/>
<CMS_PARAM name="siteMap" value="1"/>
<CMS_ARRAY_PARAM name="pageRefRendering">
<CMS_ARRAY_ELEMENT index="0..10"><![CDATA[
$CMS_IF(!#nav.ref.getPageLangSpec(#global.language).useExternalUrl())$
$CMS_IF(#nav.ref.getMultiPageParams(#global.language, #global.templateSet).getPageCount() > 1 && !#nav.ref.getMultiPageParams(#global.language, #global.templateSet).getData().isEmpty)$
$CMS_FOR(multiPage, #nav.ref.getMultiPageParams(#global.language, #global.templateSet).getData())$
<url>
<loc>$CMS_VALUE(ref(#nav.ref, abs:1, contentId:multiPage.getId()).url.toString().split("/").map(x->x.urlEncode).toString("/"))$</loc>
<lastmod>$CMS_VALUE(multiPage.getLastChange().format("yyyy-MM-dd'T'HH:mm:ssZ").substring(0, 22)+":00")$</lastmod>
</url>
$CMS_END_FOR$
$CMS_ELSE$
<url>
<loc>$CMS_VALUE(ref(#nav.ref, abs:1).url.toString().split("/").map(x->x.urlEncode).toString("/"))$</loc>
<lastmod>$CMS_VALUE(#nav.ref.page.changeDate().format("yyyy-MM-dd'T'HH:mm:ssZ").substring(0, 22)+":00")$</lastmod>
</url>
$CMS_END_IF$
$CMS_END_IF$
]]></CMS_ARRAY_ELEMENT>
</CMS_ARRAY_PARAM>
</CMS_FUNCTION>
</CMS_HEADER><?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.google.com/schemas/sitemap/0.9">
$CMS_VALUE(sitemap)$
</urlset>