Editting rss.php to work with twittefeed?

Hi,

I have my rss.php to work with twitterfeed so each time an author updates their story it posts on the site's twitter and FB. The problem I have is that after they have updated once, twitterfeed thinks it's spam and won't post any further updates. I think it's because it links directly to the story's main page instead of the new chapter (it's the same link as before). Is there a way of changing the rss.php so that when someone updates the link sends them to the new chapter (and therefore a new page so twitterfeed posts).

My rss.php:

<?php
// ----------------------------------------------------------------------
// Copyright (c) 2007 by Tammy Keefer
// Based on eFiction 1.1
// Copyright (C) 2003 by Rebecca Smallwood.
//  http://efiction.sourceforge.net/ 
// ----------------------------------------------------------------------
// LICENSE
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License (GPL)
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// To read the license please visit  http://www.gnu.org/copyleft/gpl.html 
// ----------------------------------------------------------------------

define("_BASEDIR", "");
  include_once("includes/dbfunctions.php");    
  include_once("config.php"); 
$settingsresults = dbquery("SELECT sitename, url, siteemail, slogan, language, tableprefix, dateformat FROM ".$settingsprefix."fanfiction_settings WHERE sitekey = '$sitekey'");
$settings = dbassoc($settingsresults);
foreach($settings as $var => $val) {
$$var = $val;
}
define("TABLEPREFIX", $tableprefix);
define("SITEKEY", $sitekey);
  include_once("includes/queries.php");
  if(file_exists("languages/{$language}.php")) include("languages/{$language}.php");
  else include("languages/en.php");
  ob_start ("ob_gzhandler"); 

function xmlentities ( $string )
{
   return str_replace ( array ( '&', '"', "'", '<', '>' ), array ( '&amp;' , '&quot;', '&apos;' , '&lt;' , '&gt;' ), $string );
}

$ratlist = dbquery("SELECT * FROM ".TABLEPREFIX."fanfiction_ratings");
while($rate = dbassoc($ratlist)) {
$ratings[$rate['rid']] = $rate['rating'];
}

  $rss="<?xml version="1.0" encoding=""._CHARSET.""?>n"; 
  $rss.="<rss version="2.0">n"; 
  $rss.="<channel>n"; 
  $rss.="<copyright>Copyright ".date("Y")."</copyright>n"; 
  $rss.="<lastBuildDate>".date("r")."</lastBuildDate>n"; 
  $rss.="<description>".xmlentities($slogan)."</description>n"; 
  $rss.="<link>$url</link>n"; 
  $rss.="<title>".xmlentities( $sitename)."</title>n"; 
  $rss.="<managingEditor>$siteemail</managingEditor>n"; 
  $rss.="<webMaster>$siteemail</webMaster>n"; 
  $rss.="<language>$language</language>n"; 

$query = _STORYQUERY." ORDER BY updated DESC LIMIT 20";
$results = dbquery($query);
while($story = dbassoc($results)) {
    $story['authors'][] = $story['penname'];
    if($story['coauthors']) {
$coauth = dbquery("SELECT "._PENNAMEFIELD." as penname, co.uid FROM ".TABLEPREFIX."fanfiction_coauthors AS co LEFT JOIN "._AUTHORTABLE." ON co.uid = "._UIDFIELD." WHERE co.sid = '".$story['sid']."'");
while($c = dbassoc($coauth)) {
$story['authors'][] = $c['penname'];
}
    }
    foreach($story['authors'] AS $k => $v) {
$story['authors'][$k] = strip_tags(xmlentities( $v));
    }
    $rss.= "<item>
<title>".strip_tags(xmlentities($story['title']))." "._BY." ".implode(", ", $story['authors'])." [".$ratings[$story['rid']]."]</title>
<link>$url/fiction/viewstory.php?sid=".$story['sid']."</link>
<description>".strip_tags(xmlentities($story['summary']))."</description>
<pubDate>".date("r",$story['updated'])."</pubDate>
     </item>n";  
} 

  $rss.="</channel>
</rss>"; 

  header("Content-type: application/rss+xml"); 
  header("Cache-Control: must-revalidate"); 
  header("Expires: ".gmdate("D, d M Y H:i:s", time() + 3600) . " GMT"); 

  echo $rss; 

?>

The only change I've made to that file is the location in <url> so it goes to /fiction.

Any help would be great. At the moment I've got links disabled in twitterfeed so it updates but that's really not desirable.

Thanks,
Jo
http://www.gigglesnort.net