Headers already sent...

[mr e]

Ok this is what I get...

Warning: Cannot add header information - headers already sent by (output started at /usr/local/psa/home/vhosts/wcgalaxy.com/httpdocs/index.php:26) in /usr/local/psa/home/vhosts/wcgalaxy.com/httpdocs/shoutbox.php on line 31

Here is line 26 of index.php

PHP Code:

<? include ("header.php") ?>

and here is line 31 of shoutbox.php

PHP Code:

header ("Location: [url]http://www.wcgalaxy.com/[/url]"); 


I can't for the life of me, figure out how to get it to not give me this error when you hit submit on the shoutbox, when you hit submit, it basically writes to a text file and then tries to refresh the page to display your shout, but when it refreshes I get this error.