Session only valid for some sections?

[blockb]

I have a problem with my sessions for loged in users when using phpbb_seo.

The user can log in and is loged on on my forums homepage, but not on category listing pages or different posts.

You can see this by login in on lånforum.nu/ with
Username: hugoB
Password: qwerty

As you can se you are loged in at the homepage but if you visit a category page you are not loged in anymore, but if you go back to homepage you are loged in again.

Any suggestions?