Error >Unable to add cookies, header already sent.

[AllenMead]

Have stated to get the following error with no idea whats caused it? Any help
would be great. :)

------------------------------------------------------------------------------
Unable to add cookies, header already sent.
File: /home/spotty/public_html/forum/includes/class_core.php
Line: 1

[Lynne]

Make sure you are using a totally default copy of the class_core.php file. If you already are, then try disabling your modifications/plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

[kienna]

Make sure you are using a totally default copy of the class_core.php file. If you already are, then try disabling your modifications/plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

hi bro, if i disable how i can run other mod? :(

[Lynne]

You would then disable all your mods, remove that line from the config.php file, and then turn them on one-by-one until you find the problem mod.