RSS FEED มีปัญหา ไม่อัพลง Database ได้ และ ใน xml ก็ไม่รัน

<?php
include"include/config-settings.php";

$story_status = $_POST['status_up'];
$st_id = $_POST['id_up'];

$datetoday = date("Ymd");
$day = substr($datetoday,6,2);
$month = substr($datetoday,4,2);
$year = substr($datetoday,0,4);

$newdate = "$year-$month-$day";

$sql_update = "UPDATE articles SET status='$story_status',date='$newdate' WHERE id='$st_id'";
$result_update = mysql_query($sql_update);

$SQL1="select * from articles where status = 'Published' and id = '$st_id' order by id desc LIMIT 0,1";
$RE1=mysql_db_query($dbname,$SQL1);
$total = mysql_num_rows($RE1);
$fetch=mysql_fetch_array($RE1);
	//$linkid=$fetch['0']; 
	$headline = $fetch['headline']; 
	$description = $fetch['description'];
	
date_default_timezone_set('Asia/Bangkok'); 

$publicdate=date("Y-m-d H:i:s",time());
$linkfull="http://www.---.com/view-story.php?sid=".$st_id;

if($total != 0){
$SQL2="INSERT INTO rssfeed (rid,topic,description,link,publicdate) VALUES ('$st_id','$headline','$description','$linkfull','$publicdate')";
$RE2=mysql_db_query($dbname,$SQL2);
if(!$RE2){echo "error";}

require("rss/rss.php");
}
?>
<script language="JavaScript">
alert('Story status has been changed!');
window.opener.location.reload();
window.close();
</script>

<?php 
require("config-settings.php");

$sql = "select * from rssfeed order by rid desc";
$query = mysql_db_query($dbname, $sql); 

date_default_timezone_set('Asia/Bangkok'); 
$data = '<?xml version="1.0" encoding="TIS-620"?>'."\n";
$data .= '<rss version="2.0">'."\n";
$data .= '<channel>'."\n";

$data .= '<title>Andrew Drummond</title>'."\n";
$data .= '<description>Rss XML</description>'."\n";
$data .= '<link>http://www.----.com</link>'."\n";
$data .= '<pubDate>'.date("Y-m-d H:i:s").'</pubDate>'."\n";

while($result = mysql_fetch_array($query)) {
$data .= '<item>'."\n"; 
$data .= '<title>'.$result[topic].'</title>'."\n"; 
$data .= '<description>'.$result[description].'</description>'."\n";
$data .= '<link>'.$result[link].'</link>'."\n"; 
$data .= '<pubDate>'.$result[publicdate].'</pubDate>'."\n";
$data .= '</item>'."\n"; 
}

$data .= '</channel>'."\n";
$data .= '</rss>'."\n";

$f = fopen( 'rss/rss.xml' , 'w' ); 
ini_set ("allow_url_fopen","On");
fputs( $f , $data );
fclose( $f );
?>