Unknown critical error, help needed asap

[Andrew Evenstar]

Hello,

I manage http://www.biohazardmercenaries.com/forums/index.php

Yesterday everything on this site was working fine. I wake up today and for some reason I or other members can't log in or do anything. We can view the site / topics and information as guests but when we try to log in, we are just brought to a blank white screen

the url of the black white screen while attempting to login is: http://www.biohazardmercenaries.com/forums/index.php?action=login2

Some members have not logged out... when they try to do certain actions on the site, they are also just brought to a blank white screen.

I have no idea what has happened, I didn't do any work to the site yesterday or today, it was just like this when I woke up.

Any help greatly appreciated,
Thanks!

[Sir Osis of Liver]

Looks/works normally for guest.  Your second link is the login page, which displays correctly.

Don't see a problem.

[Andrew Evenstar]

Looks/works normally for guest.  Your second link is the login page, which displays correctly.

Don't see a problem.

I've already stated above that it works ok for a guest. However, I am the admin of the site and I cannot even login. And yes i know the second link is the login link, however the site just gets stuck on a white page after trying to login. This occurs not only for me but for nearly all members.

not sure if this is it but my webhost found some of these errors in the log:

Koodi [Valitse] Laajenna

: session_start() [&lt;a href='function.session-start'&gt;function.session-start&lt;/a&gt;]: Cannot send session cache limiter - headers already sent (output started at /home/evenstar/public_html/forums/index.php:2)<br />/home/evenstar/public_html/forums/Sources/Load.php<br />1966

2: Cannot modify header information - headers already sent by (output started at /home/evenstar/public_html/forums/index.php:2)<br />File: /home/evenstar/public_html/forums/Sources/Subs.php<br />Line: 2811

2: session_regenerate_id() [&lt;a href='function.session-regenerate-id'&gt;function.session-regenerate-id&lt;/a&gt;]: Cannot regenerate session id - headers already sent<br />File: /home/evenstar/public_html/forums/Sources/Subs-Auth.php<br />Line: 179

2: Cannot modify header information - headers already sent by (output started at /home/evenstar/public_html/forums/index.php:2)<br />File: /home/evenstar/public_html/forums/Sources/Load.php<br />Line: 1970

[Sir Osis of Liver]

Check your /forums/index.php for bogus code.