Problem with cookies and header

[Danielgsc]

Hello everybody. I have the next problem: when I open a subforum, appears this message

Unable to add cookies, header already sent
File: /mnt/web6/40/79/51646579/htdocs/forumdisplay.php
Line: 100

Nobody can open the subforums (users, mods, admins...)

Anybody can help me? Version:3.6.2
I have tried disabling all mods but the message appears too.
I can read threads from this subforums if I click last message...
Thanks and sorry my english.

[Marco van Herwaarden]

To troubleshoot this, please remove any hacks and disable your plugins, then see if you still have this problem.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

If so, reupload all the original vB non-image files (except install.php). Make sure you upload these in ASCII format and overwrite the ones on the server.

If your problem still exists, please create a new Style with no Parent set. Now browse the forum using this new style, do you still have the same problems? If you are troubleshooting login or guest issues, you will need to set this style as board default in the vBulletin Options.