[imp] Installing Horde Groupware Webmail Edition 4.0-RC1

[Marco]

I tried to install Horde Groupware Webmail Edition 4.0-RC1 (May 18 2011).

I followed 
http://www.horde.org/apps/webmail/docs/INSTALL
#configuring-horde-groupware-webmail-edition

until point 3 at the "Authentication" tab setting.
I applied "Generate Horde Configuation" and Horde left me this fatal error:

HORDE: HORDE Missing base parameter. [pid 29574 on line 97 of
"/usr/share/pear/Horde/Core/Auth/Application.php"]

Do you have any hints?

Thanks a lot
Marco

This is the conf.php.
<?php
/* CONFIG START. DO NOT CHANGE ANYTHING IN OR AFTER THIS LINE. */
// $Id: 03e33271c4875ad28c5136a2066238936ccbc5bb $
$conf['vhosts'] = false;
$conf['debug_level'] = E_ALL & ~E_NOTICE;
$conf['max_exec_time'] = 0;
$conf['compress_pages'] = true;
$conf['secret_key'] = 'xxxx';
$conf['umask'] = 077;
$conf['testdisable'] = true;
$conf['use_ssl'] = 2;
$conf['server']['name'] = $_SERVER['SERVER_NAME'];
$conf['server']['port'] = $_SERVER['SERVER_PORT'];
$conf['urls']['token_lifetime'] = 30;
$conf['urls']['hmac_lifetime'] = 30;
$conf['urls']['pretty'] = false;
$conf['safe_ips'] = array();
$conf['session']['name'] = 'Horde';
$conf['session']['use_only_cookies'] = true;
$conf['session']['cache_limiter'] = 'nocache';
$conf['session']['timeout'] = 0;
$conf['cookie']['domain'] = $_SERVER['SERVER_NAME'];
$conf['cookie']['path'] = '/';
$conf['sql']['username'] = 'username';
$conf['sql']['password'] = 'password';
$conf['sql']['hostspec'] = 'host.it';
$conf['sql']['port'] = 3300;
$conf['sql']['protocol'] = 'tcp';
$conf['sql']['database'] = 'db';
$conf['sql']['charset'] = 'utf-8';
$conf['sql']['splitread'] = false;
$conf['sql']['ssl'] = false;
$conf['sql']['phptype'] = 'mysqli';
$conf['ldap']['useldap'] = false;
$conf['auth']['admins'] = array('admin');
$conf['auth']['checkip'] = true;
$conf['auth']['checkbrowser'] = true;
$conf['auth']['alternate_login'] = false;
$conf['auth']['redirect_on_logout'] = false;
$conf['auth']['list_users'] = 'list';
$conf['auth']['params']['app'] = 'horde';
$conf['auth']['driver'] = 'application';
$conf['signup']['allow'] = false;
$conf['log']['priority'] = 'INFO';
$conf['log']['ident'] = 'HORDE';
$conf['log']['name'] = LOG_USER;
$conf['log']['type'] = 'syslog';
$conf['log']['enabled'] = true;
$conf['log_accesskeys'] = false;
$conf['prefs']['params']['driverconfig'] = 'horde';
$conf['prefs']['driver'] = 'Sql';
$conf['alarms']['params']['driverconfig'] = 'horde';
$conf['alarms']['params']['ttl'] = 300;
$conf['alarms']['driver'] = 'Sql';
$conf['datatree']['driver'] = 'null';
$conf['group']['driverconfig'] = 'horde';
$conf['group']['driver'] = 'Sql';
$conf['group']['cache'] = false;
$conf['perms']['driverconfig'] = 'horde';
$conf['perms']['driver'] = 'Sql';
$conf['share']['no_sharing'] = false;
$conf['share']['auto_create'] = true;
$conf['share']['world'] = true;
$conf['share']['any_group'] = false;
$conf['share']['hidden'] = false;
$conf['share']['cache'] = false;
$conf['share']['driver'] = 'Sqlng';
$conf['cache']['default_lifetime'] = 86400;
$conf['cache']['params']['sub'] = 0;
$conf['cache']['driver'] = 'File';
$conf['cache']['compress'] = true;
$conf['cache']['use_memorycache'] = '';
$conf['cachecss'] = false;
$conf['cachejs'] = false;
$conf['cachethemes'] = false;
$conf['lock']['params']['driverconfig'] = 'horde';
$conf['lock']['driver'] = 'Sql';
$conf['token']['params']['driverconfig'] = 'horde';
$conf['token']['driver'] = 'Sql';
$conf['mailer']['params']['sendmail_path'] = '/usr/lib/sendmail';
$conf['mailer']['params']['sendmail_args'] = '-oi';
$conf['mailer']['type'] = 'sendmail';
$conf['mailformat']['brokenrfc2231'] = false;
$conf['vfs']['params']['driverconfig'] = 'horde';
$conf['vfs']['type'] = 'Sql';
$conf['sessionhandler']['type'] = 'Builtin';
$conf['sessionhandler']['memcache'] = false;
$conf['spell']['driver'] = '';
$conf['gnupg']['keyserver'] = array('pgp.mit.edu');
$conf['gnupg']['timeout'] = 10;
$conf['image']['driver'] = false;
$conf['exif']['driver'] = 'Bundled';
$conf['problems']['email'] = 'webmaster at example.com';
$conf['problems']['maildomain'] = 'example.com';
$conf['problems']['tickets'] = false;
$conf['problems']['attachments'] = true;
$conf['menu']['apps'] = array();
$conf['menu']['always'] = false;
$conf['menu']['links']['help'] = 'all';
$conf['menu']['links']['prefs'] = 'authenticated';
$conf['menu']['links']['problem'] = 'all';
$conf['menu']['links']['login'] = 'all';
$conf['menu']['links']['logout'] = 'authenticated';
$conf['portal']['fixed_blocks'] = array();
$conf['accounts']['driver'] = 'null';
$conf['user']['verify_from_addr'] = false;
$conf['user']['select_view'] = true;
$conf['facebook']['enabled'] = false;
$conf['twitter']['enabled'] = false;
$conf['imsp']['enabled'] = false;
$conf['kolab']['enabled'] = false;
$conf['memcache']['enabled'] = false;
$conf['activesync']['state']['params']['devicetable'] =
'horde_activesync_device';
$conf['activesync']['state']['params']['statetable'] = 'horde_activesync_state';
$conf['activesync']['state']['params']['maptable'] = 'horde_activesync_map';
$conf['activesync']['state']['params']['userstable'] =
'horde_activesync_device_users';
$conf['activesync']['logging']['type'] = 'horde';
$conf['activesync']['ping']['heartbeatmin'] = 60;
$conf['activesync']['ping']['heartbeatmax'] = 2700;
$conf['activesync']['ping']['heartbeatdefault'] = 480;
$conf['activesync']['ping']['deviceping'] = true;
$conf['activesync']['ping']['waitinterval'] = 5;
$conf['activesync']['securitypolicies']['provisioning'] = false;
$conf['activesync']['enabled'] = true;
/* CONFIG END. DO NOT CHANGE ANYTHING IN OR BEFORE THIS LINE. */