[horde] User Login correkt, but only the login Screen ist up !

[Andy]

Hay Michael,

Ok, if i set

$conf['session']['use_only_cookies'] = false

then i can login as user.

The cookie is stored in my browser, i can read the keys out from cookie.

The next point in the FAQ say:

"Make sure that you are using the correct cookie domain and path 
settings in Horde's setup."

"Cookies are not stored in the browser ...", ok but the cookie is stored 
. IS the cookie stored with wrong parameters, because wrong horde conf.php ?

Extract of my conf.php:

$conf['cookie']['domain'] = $_SERVER['SERVER_NAME'];
$conf['cookie']['path'] = '/horde';

I installed horde on my vserver with the domain/hostname 
"vserver.xxxxxx.xxxx".

The horde webmailer should be read from absolutely different domain 
"webmail.xxxx.xx"-> This is configured as a VirtualHost with ServerName 
"webmail.xxxx.xx".

Is this ok ?

An another part is, the auth admins array in conf.php is set to user 
"root". How can i login as root ? There isnt a password !

Thanks,

Andy