Problema con XML 
como hago?? gracias de antemano
Código:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Green Lush</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="MSSmartTagsPreventParsing" content="true" />
<meta name="generator" content="Blogger" />
<link rel="alternate" type="application/atom+xml" title="Green Lush - Atom" href="http://green-lush.blogspot.com/feeds/posts/default" />
<link rel="alternate" type="application/rss+xml" title="Green Lush - RSS" href="http://green-lush.blogspot.com/feeds/posts/default?alt=rss" />
<link rel="service.post" type="application/atom+xml" title="Green Lush - Atom" href="http://www.blogger.com/feeds/31178424/posts/default" />
<link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://www.blogger.com/rsd.g?blogID=31178424" />
<style type="text/css">
@import url("http://www.blogger.com/css/blog_controls.css");
@import url("http://www.blogger.com/dyn-css/authorization.css?blogID=31178424");
</style>
<style type="text/css" media="screen">
/*
Theme Name: Green Lush
Theme URI: http://www.bloggertemplates.org/review/green-lush
Description: Green Lush is a modification of the layout originally created by Yamazaki,
which can be found at Open Source Web Design website;
http://www.oswd.org/design/preview/id/2898
Version: 0.1
Author: Ali Kuru
Author URI: http://www.acemiblogcu.com
Licence: (cc) Creative Commons Attribution-ShareAlike 2.5
Licence URI: http://creativecommons.org/licenses/by-sa/2.5/
*/
body
{
font-size: 62.5%; /* reset 1EM to 10px */
margin: 0;
padding: 0;
font-family: 'lucida grande', arial, tahoma, sans-serif;
}
body p
{
font-family: 'lucida grande', 'franklin gothic medium', sans-serif;
color: #767676;
font-size: 1.2em;
line-height: 170%;
}
body a
{
color: #94c258;
text-decoration: none;
}
body a:hover
{
color: #767676;
background-color:#d8f7af;
text-decoration: none;
}
#gcontainer
{
margin: 0 auto;
width: 683px;
position: relative;
}
#gheader
{
margin: 0 auto;
width: 640px;
height: 96px;
}
.headtitle
{
position: relative;
font-family: 'lucida grande', arial, tahoma, sans-serif;
font-size: 30px;
color: #FFF;
top: 8px;
left: 12px;
}
#menu
{
margin: 0 20px;
height: 29px;
background: #bbd75a !important;
background: #b3d24e;
padding: 5px 0;
}
#menu ul
{
margin: 0;
padding: 7px;
height: 29px;
}
#menu ul li
{
list-style: none;
display: inline;
}
#menu ul li a:link, #menu ul li a:active, #menu ul li a:visited
{
color: #767676;
padding: 13px 7px 15px 7px;
font-size: 1em;
font-family: 'lucida grande', arial, sans-serif;
font-weight: bold;
text-decoration: none;
}
#menu ul li a:hover
{
color: #FDFDFD;
}
#roundedheader
{
width: 640px;
height: 18px;
margin: 0 auto;
_margin-top: -14px !important; /* IE Hack */
}
#content
{
min-height: 390px;
width: 640px;
margin: 0 auto;
}
#insidecontent
{
float: left;
padding-left: 25px;
width: 355px;
}
#insidecontent p
{
margin: 0;
color: #767676;
font-family: 'lucida grande', 'franklin gothic medium', sans-serif;
font-size: 1.2em;
line-height: 170%;
}
#insidecontent ul
{
margin-left: 8px;
_margin-left: 45px; /* IE Hack */
color: #767676;
font-family: 'lucida grande', 'franklin gothic medium', sans-serif;
font-size: 1.2em;
line-height: 125%;
}
#insidecontent ul li
{
list-style-type: disc !important;
}
#comments ol li
{
margin-top: 10px;
margin-bottom: 10px;
}
blockquote
{
margin: 10px 0px 10px 20px;
padding: 5px 10px;
border-top: 1px solid #eee;
border-bottom: 1px solid #eee;
font: 1.2em 'lucida grande', 'franklin gothic medium', sans-serif;
line-height: 125%;
color: #767676;
}
code
{
font: 0.8em 'Courier New', Courier, Fixed;
background-color:#d8f7af;
line-height: 125% !important;
display: block;
}
/* Using 'class="alignright"' on an image will (who would've
thought?!) align the image to the right. And using 'class="centered',
will of course center the image. This is much better than using
align="center", being much more futureproof (and valid) */
img.centered {
display: block;
margin-left: auto;
margin-right: auto;
}
img.alignright {
padding: 4px;
margin: 0 0 2px 7px;
display: inline;
}
img.alignleft {
padding: 4px;
margin: 0 7px 2px 0;
display: inline;
}
.alignright {
float: right;
}
.alignleft {
float: left
}
#sidebar
{
padding: 0 20px 10px 20px;
float: right;
width: 210px;
background: #f6f6f6;
}
#sidebar p
{
margin: 0;
color: #565656;
font-family: 'lucida grande', 'franklin gothic medium', sans-serif;
font-size: 1em;
line-height: 170%;
}
#sidebar a:link, #sidebar a:active, #sidebar a:visited
{
text-decoration: underline;
color: #e36767;
}
#sidebar a:hover
{
background-color:#C0C0C0;
text-decoration: none;
}
#sidebar ul
{
margin-top: 10px;
margin-bottom: 10px;
}
#sidebar ul li
{
margin-left: -10px;
line-height: 150%;
list-style-type: none;
padding: 0 0 0 15px;
}
#sidebar h3
{
margin: 5px 0px 5px 0px;
font-size: 1.5em;
font-weight: normal;
color: #94C258;
}
#roundedfooter
{
width: 640px;
height: 17px;
margin: 0 auto;
}
h1
{
margin: 0;
font-weight: normal;
color: #d8f7af;
font-size: 3.2em;
}
