[imp] Horde, imp automatic login similar problem

[rybka52]

Hi everyone !
I heave read previous posts about automatic login ... and i heave similar problem :
After typing URL: http://somedomain/horde/imp/ my browser redirect to http://somedomain/horde/
And after login i see horde instead imp :(

Thanks for advice.
Wojtek

My config files:

IMP config/servers.php

$servers['imap'] = array(
    'name' => 'IMAP Server',
    'server' => 'localhost',
    'hordeauth' => false,
    'protocol' => 'imap',
    'port' => 143,
    'folders' => '',
    'namespace' => '',
    'maildomain' => '',
    'smtphost' => '',
    'smtpport' => 25,
    'realm' => '',
    'preferred' => 'true',
    'dotfiles' => false,
    'hierarchies' => array()
);

HORDE config/prefs.php

// what application should we go to after login?
$_prefs['initial_application'] = array(
    'value' => 'imp',
    'locked' => false,
    'shared' => true,
    'type' => 'select',
    'desc' => sprintf(_("What application should %s display after login?"), $GL$
);