Unable to add cookies, header already sent Error

Hi there

After finally installing the arcade i have managed to get into it a few times but now i am just greeted with an error saying

Unable to add cookies, header already sent.
File: /home/fhlinux194/w/worldofchat.co.uk/user/htdocs/Forum/arcade.php
Line: 1

Does anyone know if there is a fix for this as i have looked all over this forum to see if i can find a solution ??

Mr Woc

[ResaleBroker]

Just an idea... check for whitespace in the file before the <?php

[usearchme]

yeah there is space there but i cant get rid of it, and the error has spread across my forums now i have major problems now. even if i remove the whitespace or reload the file still get the same error