[Kroupware] Problem with PHP_AUTH_USER under apache2

[Gustavo Pichorim Boiko]

Hi

I'm trying to use the webinterface of kolab, and I've some problems with 
authentication.
When login is made, the PHP_AUTH_USER is set to the current uid (in admin/
login/index.php), but when I hit any of left menus, the variable is set to 
NULL. If I hit the same link using the url admin/login/../sharedfolder/index.
php, the values are right again.

Can anyone help-me?

Thanks

Gustavo P. Boiko
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Conectiva SA