Frog CMS

Hello,
I really need your help.
My feeds don’s show any images from posts. I’ve no idea how solve that problem. Please help.

Here is my feed code:

<?php echo '<?'; ?>xml version="1.0" encoding="UTF-8"<?php echo '?>'; ?> 
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
	<title>Grid Based Designs</title>
	<link><?php echo BASE_URL ?></link>
	<atom:link href="<?php echo BASE_URL ?>/rss.xml" rel="self" type="application/rss+xml" />
	<language>en-us</language>
	<copyright>Copyright <?php echo date('Y'); ?>, brilliancy.eu</copyright>
	<pubDate><?php echo strftime('%a, %d %b %Y %H:%M:%S %z'); ?></pubDate>
	<lastBuildDate><?php echo strftime('%a, %d %b %Y %H:%M:%S %z'); ?></lastBuildDate>
	<category>any</category>
	<generator>Frog CMS</generator>
	<description>Latest Submissions</description>
        <author>mail@brilliancy.eu (www.brilliancy.eu)</author>
	<docs>http://www.rssboard.org/rss-specification</docs>
	<?php $articles = $this->find('articles'); ?>
	<?php foreach ($articles->children(array('limit' => 20, 'order' => 'page.created_on DESC')) as $article): ?>
	<item>
		<title><?php echo $article->title(); ?></title>
		<description><?php if ($article->hasContent('summary')) { echo $article->content('summary'); } else { echo strip_tags($article->content()); } ?></description>
		<pubDate><?php echo $article->date('%a, %d %b %Y %H:%M:%S %z'); ?></pubDate>
		<link><?php echo $article->url(); ?></link>
		<guid><?php echo $article->url(); ?></guid>
	</item>
	<?php endforeach; ?>
</channel>
</rss>