please help me with this code it work locally but when uploaded i get error



<?php
if (!file_exists('config.php'))
{
header("Location: ./install/install.php";
exit();
}
require('config.php');
ob_start();

//These lines will set application/xhtml+xml as content-type if the browser
// support this. This will mean that the XHTML has to go through an XML-parser!
// If you don't like that, remove the 4 next lines
if (isset($_SERVER["HTTP_ACCEPT"])
&& stristr($_SERVER["HTTP_ACCEPT"], "application/xhtml+xml")
header ("Content-type: application/xhtml+xml; charset=utf-8";
else
header ("Content-type: text/html; charset=utf-8";


require('standalone_header.php');
require('embedded.php');
require('standalone_footer.php');
ob_end_flush();
?>




this is the site

xtranok.awardspace.co.uk/guestbook-1.0.9/index.php

Check your php page that echoes your xml, there could be another output (output could be text, html tags, error notice or php echo/print) apart from your xml

The area generating your xml is where your problem lies. since you did not post that source code, there is very little i can do.