you have whitespace problems
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /www/phpmyadmin/export.php:120) in <b>/www/phpmyadmin/libraries/header_http.inc.php</b> on line <b>14</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /www/phpmyadmin/export.php:120) in <b>/www/phpmyadmin/libraries/header_http.inc.php</b> on line <b>15</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /www/phpmyadmin/export.php:120) in <b>/www/phpmyadmin/libraries/header_http.inc.php</b> on line <b>16</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /www/phpmyadmin/export.php:120) in <b>/www/phpmyadmin/libraries/header_http.inc.php</b> on line <b>17</b><br />
<br />
<b>Warning</b>: Cannot modify header information - headers already sent by (output started at /www/phpmyadmin/export.php:120) in <b>/www/phpmyadmin/libraries/header_http.inc.php</b> on line <b>20</b><br />
<?xml version="1.0" encoding="iso-8859-1"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de" lang="de" dir="ltr">
<head>
<title>phpMyAdmin</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<base href="http://xyz-myserver.com/mysqladmin/" />
<script language="JavaScript" type="text/javascript">
<!--
/* added 2004-06-10 by Michael Keck
* we need this for Backwards-Compatibility and resolving problems
* with non DOM browsers, which may have problems with css 2 (like NC 4)
*/
var isDOM = (typeof(document.getElementsByTagName) != 'undefined'
&& typeof(document.createElement) != 'undefined')
? 1 : 0;
var isIE4 = (typeof(document.all) != 'undefined'
&& parseInt(navigator.appVersion) >= 4)
? 1 : 0;
var isNS4 = (typeof(document.layers) != 'undefined')
? 1 : 0;
var capable = (isDOM || isIE4 || isNS4)
? 1 : 0;
// Uggly fix for Opera and Konqueror 2.2 that are half DOM compliant
if (capable) {
if (typeof(window.opera) != 'undefined') {
var browserName = ' ' + navigator.userAgent.toLowerCase();
if ((browserName.indexOf('konqueror 7') == 0)) {
capable = 0;
}
} else if (typeof(navigator.userAgent) != 'undefined') {
var browserName = ' ' + navigator.userAgent.toLowerCase();
if ((browserName.indexOf('konqueror') > 0) && (browserName.indexOf('konqueror/3') == 0)) {
capable = 0;
