Is this XML file correct for RSS feeding?

I am generating a XML-RSS type file from PHP.

The output for example is like this

<?xml version="1.0" encoding="iso-8859-1"?>
<rss version="2.0">
 <channel>
    <title>Mi web mola</title>
    <link>http://www.dominio.com/blog.php</link>
    <language>es-ES</language>
    <description>Mallas y eso</description>
    <generator>Autor</generator>

     <item>
      <title>Articulo de prueba</title>
      <link>http://www.midominio.com/2342</link>
      <pubDate>14/06/2010</pubDate>
      <description><![CDATA[Descripcion de prueba bla bla bla]]></description>
      <content:encoded><![CDATA[Contenido prueba]]></content:encoded>
     </item>

 </channel>
</rss> 

... and all I can see in the Firefox preview is the title and the description of the blog, not the items, but in the source it appears correctly, so I'开发者_运维技巧ve thought it must be a parse error or something like that..

What could be wrong?

Again, excuse me for my bad english, and thank you very much.

I don't know if this is your RSS problem, but as it stands that isn't valid XML-with-namespaces.

If you want to use a <content:encoded> element, you should declare a namespace for the prefix content.

<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">

Also pubDate should be in RFC822 format, eg. Mon, 14 Jun 2010 12:00:00 GMT.