[MickDoneDee]

This thread might offer some tips:
https://vborg.vbsupport.ru/showthread.php?t=73315

First RSS has to be enabled in the Admin CP.

In vBulletin Options go to the setting group called External Data Provider. Select Yes to Enable RSS Syndication and click Save.

I think you already have it enabled anyway because I see your RSS feed when I click:
http://www.soapchat.burtonhosting.co...2&forumids=142

For an explanation of RSS click here.

The above explanation also mentions that multiple RSS formats exist which you can see by replacing RSS2 with RSS1 or RSS0.91. It seems external.php only outputs RSS 2.0 and 0.91.

external.php is set to output 15 articles.

if ($forumchoice != '')
{
	// query last 15 threads from visible / chosen forums
	$threads = $DB_site->query("
		SELECT thread.threadid, thread.title, thread.lastposter, thread.lastpost, thread.postusername, thread.dateline, forum.forumid, forum.title AS forumtitle, post.pagetext AS preview
		FROM " . TABLE_PREFIX . "thread AS thread
		INNER JOIN " . TABLE_PREFIX . "forum AS forum ON(forum.forumid = thread.forumid)
		LEFT JOIN " . TABLE_PREFIX . "post AS post ON (post.postid = thread.firstpostid)
		LEFT JOIN " . TABLE_PREFIX . "deletionlog AS deletionlog ON (deletionlog.primaryid = thread.threadid AND deletionlog.type = 'thread')
		WHERE 1=1
			$forumchoice
			AND thread.visible = 1
			AND open <> 10
			AND deletionlog.primaryid IS NULL
		ORDER BY thread.dateline DESC
		LIMIT 15
	");
}