[imp] change from www.example.com/horde to mail.example.com

[Leo Kenner]

I am trying to setup horde so I can access it (and imp) via mail.example.com, 
rather than www.example.com/horde

I have made the changes below and get the login screen, but when I try to 
login I get a screen that says action canceled.

The faq has not provided me with any ideas of what might be wrong, and I have 
been unable to locate this issue in the archives.


In Apache I have entered the following:
Alias /horde/ /var/www/html/horde/
Alias /imp/ /var/www/html/horde/imp/
DocumentRoot /var/www/html/horde

I have changed the registry.php in /horde/config:
$this->applications['horde'] = array(
    'fileroot' => dirname(__FILE__) . '/..',
//    'webroot' => '/horde',
    'webroot' => '',
    'initial_page' => 'login.php',
    'icon' => '/horde/graphics/home.gif',
    'name' => _("Horde"),
    'allow_guests' => true,
    'status' => 'active',
    'templates' => dirname(__FILE__) . '/../templates',
    'cookie_domain' => $_SERVER['SERVER_NAME'],
//    'cookie_path' => '/horde',
    'cookie_path' => '/',
    'server_name' => $_SERVER['SERVER_NAME'],
    'server_port' => $_SERVER['SERVER_PORT']
);



I am running the following:
Horde 2.2.1
Imp 3.2
Turba 1.1
Mandrake 9.0