Error when upodating product (Admin)

[effendi_baba]

When I try to update status of orders I get the following error ( in the Customers -> Order Module ) I get the following errors

 

Warning: Cannot modify header information - headers already sent by (output started at C:\Webspace\dressmetender\dressmetender.com\dressmetender.com\www\catalog\admin\includes\application_top.php:11) in C:\Webspace\dressmetender\dressmetender.com\dressmetender.com\www\catalog\admin\includes\functions\general.php on line 18

 

This is line 18 in the general.php

 

header('Location: ' . $url);

 

if (STORE_PAGE_PARSE_TIME == 'true') {

if (!is_object($logger)) $logger = new logger;

$logger->timer_stop();

}

 

exit;

}

 

 

Cna anyone help me? what's wrong with this?