rss not working

[vbbit]

I keep getting this error from the feed:

Invalid xml declaration.
 Line: 2 Character: 3

<?xml version="2.0" encoding="ISO-8859-1"?>

and my php is:

<?php

//header("Content-type: application/xml; charset={$config['encoding']}");

include 'config.php';

//$query = "SELECT n.*,a.* FROM news AS n LEFT JOIN authors AS a ON a.aid=n.n_author_id ORDER BY
//(is_numeric($config['headlines']) && $config['headlines']>0 ? " LIMIT {$config['headlines']}" : null));
//
//$result = mysql_query($query) or die ('Error' . mysql_error());

$news_headlines = mysql_query("SELECT n.*,a.* FROM news AS n LEFT JOIN authors AS a ON a.aid=n.n_author_id ORDER BY n.n_time DESC".(is_numeric($config['headlines']) && $config['headlines']>0 ? " LIMIT {$config['headlines']}" : null));
$items_output    = null;

if(mysql_num_rows($news_headlines))
{
    while($headline = mysql_fetch_assoc($news_headlines))
    {
        $link            = htmlentities("http://example.com/index.php?act=news&id={$headline['nid']}");
        $pubdate        = gmdate('r',$headline['n_time']);
        $author            = $config['show_author_info'] ? "nttt<author>{$headline['a_email']} ({$headline['a_name']})</author>" : null;
        $description    = nl2br($headline['n_body']);

        $items_output .= <<<EOF

        <item>
            <title>{$headline['n_title']}</title>
            <description>
                {$description}
            </description>
            <link>{$link}</link>
            <pubDate>{$pubdate}</pubDate>{$author}
        </item>
EOF;
    }
}

$config['encoding']    = empty($config['encoding']) ? 'ISO-8859-1' : $config['encoding'];
$copyright            = empty($config['copyright']) ? null : "ntt<copyright>".str_replace('{year}',date('Y'),$config['copyright'])."</copyright>";
$pubdate            = $config['show_feed_pubdate'] ? "ntt<pubDate>".gmdate('r')."</pubDate>" : null;
$language            = empty($config['language']) ? null : "ntt<language>{$config['language']}</language>";
$output = <<<EOF
<?xml version="2.0" encoding="{$config['encoding']}"?>
<rss version="2.0">
    <channel>
        <title>{$config['feed_title']}</title>
        <link>{$config['link']}</link>
        <description>{$config['description']}</description>{$copyright}{$pubdate}{$language}{$items_output}
    </channel>
</rss>

EOF;
echo $output;
?>