[horde] error after installing at registry.php

[Reginaldo Filippus]

Hi.

After install and configure horde, I do conect at link
http://mydomain.com.br/horde/ and it appears the error:

Fatal error: Call to undefined function: _() in
/usr/local/www/horde/config/registry.php on line 91

below at line 91 of archive /usr/local/www/horde/config/registry:

$this->applications['horde'] = array(
    'fileroot' => dirname(__FILE__) . '/..',
    'webroot' => '/horde',
    'initial_page' => 'login.php',
    'icon' => '/horde/graphics/home.gif',
    'name' => _("Horde"),                        (----------->>>>>
LINE 91, LINE 91)
    'allow_guests' => true,
    'status' => 'active',
    'templates' => dirname(__FILE__) . '/../templates',
    'cookie_domain' => $_SERVER['SERVER_NAME'],
    // ** If IE will be used to access Horde modules, you should read
    //    this discussion about the cookie_path setting (discussing issues
    //    with IE's Content Advisor):
    //    http://lists.horde.org/archives/imp/Week-of-Mon-20030113/029149.html
    'cookie_path' => '/horde',                                                
    'server_name' => $_SERVER['SERVER_NAME'],
    'server_port' => $_SERVER['SERVER_PORT']
);



What it can be happening?

Thanks.
[]'s Filippus