We are trying to authenticate users through integration. I used the information that was provided through the wiki. But I'm getting application error 1401. Below is my configuration of config_inc.php:

<?php
$g_hostname               = 'localhost';
$g_db_type                = 'mysqli';
$g_database_name          = 'test';
$g_db_username            = 'test';
$g_db_password            = '*****';
$g_default_timezone       = 'UTC';
$g_crypto_master_salt     = '*****;

# --- LDAP ---
$g_login_method = LDAP;
$g_ldap_use_starttls = OFF;
$g_ldap_server = '******:386';  
$g_ldap_root_dn = 'ou=*****,dc=****,dc=***'; 
$g_ldap_bind_dn = 'cn=****,ou=****,dc=****,dc=****'; 
$g_ldap_bind_passwd = '***********';

$g_use_ldap_realname = ON;
$g_ldap_realname_field = 'sn';
$g_ldap_realname_field2 = 'givenname';
$g_ldap_realname_field3 = 'gecos';

$g_ldap_protocol_version = 3; 

The user who tries to log in is already created but it is not possible, the error it shows is the following

APPLICATION ERROR # 1401

Connection to LDAP server failed

"Use the "Back" button on your web browser to go back to the previous page. There you can correct the problems that have been identified in this error notification or select another action. You can also click on an option in the menu bar to go directly to a new section."

thanks....