[imp] MIMP login twice on Groupware Webmail

[Umut Arus]

Hi,

I have installed Horde Groupware Webmail Edition with MIMP. Although IMP 
runs fine, MIMP login screen displays after IMP login screen. I had 
configured  horde/config/conf.php as http://wiki.horde.org/MIMPHowTo,

$conf['auth']['driver'] = 'composite';
$conf['auth']['params']['drivers'] = array(
    'imp' => array('driver' => 'application',
                   'params' => array('app' => 'imp')),
    'mimp' => array('driver' => 'application',
                    'params' => array('app' => 'mimp')));
$conf['auth']['params']['loginscreen_switch'] = '_horde_select_loginscreen';
if (!function_exists('_horde_select_loginscreen')) {
    function _horde_select_loginscreen()
    {
        require_once 'Horde/Browser.php';
        $browser = new Browser();
        if ($browser->isMobile()) {
            return 'mimp';
        }
        return 'imp';
    }
}

What is the problem?

Another problem is how to configure MIMP application runs seperately 
from IMP? So, is it possible to run application after typing 
http://webmail.xxxx.com/horde/mimp. Is there any way?

Regards,