problem with header()

[j.kuehne@xxxxxxxxxxxxxx]

Hi 

I can not submit any header() information in the following context.
What is wrong within the code?

<?php

require_once  "includes/db.inc";
require_once "HTML/Template/ITX.php"; 

if (!($connection = @ mysql_connect($hostname, $username, $password)))
   die("Could not connect to database");
 
$status = mysqlclean($_GET, "status", 1, $connection);
$template = new HTML_Template_ITX("./templates");
$template->loadTemplatefile("form2tpl.tpl", true, true);


$template->setCurrentBlock("success"); 
$template->setVariable("AUTOR", $_REQUEST["autor_eb"]);
$template->setVariable("STICHWORT", $_REQUEST["stichwort_eb"]);
$template->setVariable("DATUM", $_REQUEST["datum_eb"]);
$template->setVariable("ANLAGE", $_REQUEST["anlage_eb"]);
$template->setVariable("PROBLEM", $_REQUEST["problem_eb"]);
$template->parseCurrentBlock();
$template->show();


session_start(); 

foreach($_POST as $Key => $Value) {
$_SESSION[$Key] = $Value;
}

if ($_POST['submit'] == "Eintrag Bearbeiten"){
   header("Location: http://127.0.0.1/www2/knowledge_db/knowbase02.php";);
   exit;
}
?>

Best regards, Joerg Kuehne