About PHPBB (or any CMS), try this:
- Login to the ssh
- Go to your web folder (/home/www/webXX/web i guess)
chmod -R 777 phpBB (or your phpbb folder)
chown -R apache:apache phpBB (or your phpbb folder)
If it works, its hard to explain, but you have to do it that way or configure SELinux...