Blank page after submiting post (Urgent help)

[Pakiisp]

Hello phpBB-SEO team,

Recently I succesfuly updated my forum from 3.0.10 to 3.0.11 version. But Now I've lot of problems!

When submiting a new post or reply to post in full editor I got white blank page. Link stucked: http://mydomain.com/forum/posting.php?m ... =59&t=8324 same in private msg.

When I submit post in quick reply, page rediracted to search: Information: No suitable matches were found.

In ACP, I tried to send mass email to my users I got error: E-mail error

» EMAIL/PHP/mail()
/forum/adm/index.php

Board url: http://www.pakiisp.com/forum version: 3.0.11
PHP version: 5.2.17
OpenSSL support: enabled

current style: Artodia: Deluxe

Mods installed via AutoMod:
Top five:
phpBB SEO Dynamic Meta tags:
phpBB mChat

All mods and forum was working very well in phpBB 3.0.10 version. debug in config.php is activated but after blank page there is no error showing.
Please help to fix these problems.

Your help would be apprictaed!

[coolhand]

Once i had a similar problem: blank pages after loging in and when trying to acces the ACP. What i did: using filezilla or any ftp program go to the phpbb_seo / cache folder and delete evereything BUT .htaccess and index html. Hope this helps. Even if your board is broken remember to back it up (including your database) before doing anything.