logout

• I login in Drupal.
• I click on forum link and enter the phpbb forum, where i'm correctly logged in.
• I click on Logout in the phpbb forum: i get "Page not found" in Drupal.

I also had another problem with redirects, described here, which I paste here too, if it can be useful:
"Forum stuff" block shows 3 links: private messages, unread topics, unread posts. Links to topics and posts work, but "private messages" links to a "forum/inbox" which doesn't exist. But inbox exists, I can use it from the forum.