Hell - it's my fist steps in otrs instalations. i've got problem with LDAP Auth
Whe i trying to auth using my AD
user - otrs@mydomain.com 
member of group - otrs_allow_customer

i'm getting error:

Message: First bind failed! 80090308: LdapErr: DSID-0C090334, comment: AcceptSecurityContext error, data 525, vece
 Traceback (1311):
   Module: Kernel::System::CustomerUser::LDAP::new (v1.53) Line: 151
   Module: Kernel::System::CustomerUser::new (v1.55) Line: 105
   Module: Kernel::System::CustomerAuth::new (v1.29) Line: 95
   Module: Kernel::System::Web::InterfaceCustomer::Run (v1.41.2.1) Line: 667
   Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_customer_2epl::handler (unknown version) Line: 48
   Module: (eval) (v1.42) Line: 204
   Module: ModPerl::RegistryCooker::run (v1.42) Line: 204
   Module: ModPerl::RegistryCooker::default_handler (v1.42) Line: 170
   Module: ModPerl::Registry::handler (v1.99) Line: 31

Cant find the reason....

Here is my config.pm
_____________________________________

cat /opt/otrs/Kernel/Config.pm
# --
# Kernel/Config.pm - Config file for OTRS kernel
# Copyright (C) 2001-2009 OTRS AG, http://otrs.org/
# --
# $Id: Config.pm.dist,v 1.21 2009/02/16 12:01:43 tr Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (AGPL). If you
# did not receive this file, see http://www.gnu.org/licenses/agpl.txt.
# --
#  Note:
#
#  -->> OTRS does have a lot of config settings. For more settings
#       (Notifications, Ticket::ViewAccelerator, Ticket::NumberGenerator,
#       LDAP, PostMaster, Session, Preferences, ...) see
#       Kernel/Config/Defaults.pm and copy your wanted lines into "this"
#       config file. This file will not be changed on update!
#
# --

package Kernel::Config;

sub Load {
    my $Self = shift;
    # ---------------------------------------------------- #
    # ---------------------------------------------------- #
    #                                                      #
    #         Start of your own config options!!!          #
    #                                                      #
    # ---------------------------------------------------- #
    # ---------------------------------------------------- #

    # ---------------------------------------------------- #
    # database settings                                    #
    # ---------------------------------------------------- #
    # DatabaseHost
    # (The database host.)
    $Self->{'DatabaseHost'} = 'localhost';
    # Database
    # (The database name.)
    $Self->{'Database'} = 'otrs';
    # DatabaseUser
    # (The database user.)
    $Self->{'DatabaseUser'} = 'otrs';
    # DatabasePw
    # (The password of database user. You also can use bin/CryptPassword.pl
    # for crypted passwords.)
    $Self->{'DatabasePw'} = 'mydbpassw';
    # DatabaseDSN
    # (The database DSN for MySQL ==> more: "man DBD::mysql")
    $Self->{DatabaseDSN} = "DBI:mysql:database=$Self->{Database};host=$Self->{DatabaseHost};";

    # (The database DSN for PostgreSQL ==> more: "man DBD::Pg")
    # if you want to use a local socket connection
#    $Self->{DatabaseDSN} = "DBI:Pg:dbname=$Self->{Database};";
    # if you want to use a tcpip connection
#    $Self->{DatabaseDSN} = "DBI:Pg:dbname=$Self->{Database};host=$Self->{DatabaseHost};";

    # ---------------------------------------------------- #
    # fs root directory
    # ---------------------------------------------------- #
    $Self->{Home} = '/opt/otrs';

    # ---------------------------------------------------- #
    # insert your own config settings "here"               #
    # config settings taken from Kernel/Config/Defaults.pm #
    # ---------------------------------------------------- #
    # $Self->{SessionUseCookie} = 0;
    # $Self->{CheckMXRecord} = 0;

    # ---------------------------------------------------- #

    # ---------------------------------------------------- #
    # data inserted by installer                           #
    # ---------------------------------------------------- #
    # $DIBI$
    $Self->{'SystemID'} = 10;
    $Self->{'SecureMode'} = 1;
    $Self->{'Organization'} = 'MyCompany';
    $Self->{'LogModule::LogFile'} = '/tmp/otrs.log';
    $Self->{'LogModule'} = 'Kernel::System::Log::SysLog';
    $Self->{'FQDN'} = 'dlt-otrs.mydomain.ru';
    $Self->{'DefaultLanguage'} = 'ru';
    $Self->{'AdminEmail'} = 'otrs@mydomain.ru';
    $Self->{'DefaultCharset'} = 'utf-8';

######################################################MY#################################################
# This is an example configuration for an LDAP auth. backend.
    # (take care that Net::LDAP is installed!)
    $Self->{'Customer::AuthModule'} = 'Kernel::System::CustomerAuth::LDAP';
    $Self->{'Customer::AuthModule::LDAP::Host'} = 'dc-dlt.mydomain.ru';
    $Self->{'Customer::AuthModule::LDAP::BaseDN'} = 'dc=mydomain,dc=ru';
    $Self->{'Customer::AuthModule::LDAP::UID'} = 'uid';

    # Check if the user is allowed to auth in a posixGroup
    # (e. g. user needs to be in a group xyz to use otrs)
    $Self->{'Customer::AuthModule::LDAP::GroupDN'} = 'cn=otrs_allow_Customer,ou=IT,ou=AnotherOU,dc=mercury,dc=ru';
    $Self->{'Customer::AuthModule::LDAP::AccessAttr'} = 'memberUid';
    # for ldap posixGroups objectclass (just uid)
    $Self->{'Customer::AuthModule::LDAP::UserAttr'} = 'UID';
    # for non ldap posixGroups objectclass (full user dn)
#    $Self->{'Customer::AuthModule::LDAP::UserAttr'} = 'DN';

    # The following is valid but would only be necessary if the
    # anonymous user do NOT have permission to read from the LDAP tree
    $Self->{'Customer::AuthModule::LDAP::SearchUserDN'} = 'otrs';
    $Self->{'Customer::AuthModule::LDAP::SearchUserPw'} = 'mypassword';

    # in case you want to add always one filter to each ldap query, use
    # this option. e. g. AlwaysFilter => '(mail=*)' or AlwaysFilter => '(objectclass=user)'
#   $Self->{'Customer::AuthModule::LDAP::AlwaysFilter'} = '';

    # in case you want to add a suffix to each customer login name, then
    # you can use this option. e. g. user just want to use user but
    # in your ldap directory exists user@domain.
#    $Self->{'Customer::AuthModule::LDAP::UserSuffix'} = '@mydomain.ru';

    # Net::LDAP new params (if needed - for more info see perldoc Net::LDAP)
    $Self->{'Customer::AuthModule::LDAP::Params'} = {
        port    => 389,
        timeout => 120,
        async   => 0,
        version => 3,
    };

    # Die if backend can't work, e. g. can't connect to server.
    $Self->{'Customer::AuthModule::LDAP::Die'} = 1;






# CustomerUser
# (customer user ldap backend and settings)
    $Self->{CustomerUser} = {
        Name => 'LDAP Backend',
        Module => 'Kernel::System::CustomerUser::LDAP',
        Params => {
#            # ldap host
            Host => 'dc-dlt.mydomain.ru',
#            # ldap base dn
            BaseDN => 'ou=Users,ou=IT,ou=AnotherOU,dc=mydomain,dc=ru',
#            # search scope (one|sub)
            SSCOPE => 'sub',
#            # The following is valid but would only be necessary if the
#            # anonymous user does NOT have permission to read from the LDAP tree
            UserDN => 'otrs',
            UserPw => 'mypassword',
#            # in case you want to add always one filter to each ldap query, use
#            # this option. e. g. AlwaysFilter => '(mail=*)' or AlwaysFilter => '(objectclass=user)'
#            AlwaysFilter => '',
#            # if your frontend is e. g. iso-8859-1 and the charset of your
#            # ldap server is utf-8, use this options (if not, ignore it)
#            SourceCharset => 'utf-8',
#            DestCharset => 'iso-8859-1',
#            # die if backend can't work, e. g. can't connect to server
            Die => 1,
#            # Net::LDAP new params (if needed - for more info see perldoc Net::LDAP)
            Params => {
                port    => 389,
                timeout => 120,
                async   => 0,
                version => 3,
            },
        },
#        # customer uniq id
        CustomerKey => 'uid',
#        # customer #
        CustomerID => 'mail',
        CustomerUserListFields => ['cn', 'mail'],
        CustomerUserSearchFields => ['uid', 'cn', 'mail'],
        CustomerUserSearchPrefix => '',
        CustomerUserSearchSuffix => '*',
        CustomerUserSearchListLimit => 250,
        CustomerUserPostMasterSearchFields => ['mail'],
        CustomerUserNameFields => ['givenname', 'sn'],
#        # show not own tickets in customer panel, CompanyTickets
        CustomerUserExcludePrimaryCustomerID => 0,
#        # add a ldap filter for valid users (expert setting)
#        # CustomerUserValidFilter => '(!(description=gesperrt))',
#        # admin can't change customer preferences
#        AdminSetPreferences => 0,
#        # cache time to life in sec. - cache any ldap queris
        CacheTTL => 0,
        Map => [
#            # note: Login, Email and CustomerID needed!
#            # var, frontend, storage, shown (1=always,2=lite), required, storage-type, http-link, readonly
#            [ 'UserSalutation', 'Title',      'title',           1, 0, 'var', '', 0 ],
#            [ 'UserFirstname',  'Firstname',  'givenname',       1, 1, 'var', '', 0 ],
#            [ 'UserLastname',   'Lastname',   'sn',              1, 1, 'var', '', 0 ],
            [ 'UserLogin',      'Username',   'uid',             1, 1, 'var', '', 0 ],
            [ 'UserEmail',      'Email',      'mail',            1, 1, 'var', '', 0 ],
            [ 'UserCustomerID', 'CustomerID', 'mail',            0, 1, 'var', '', 0 ],
#            # [ 'UserCustomerIDs', 'CustomerIDs', 'second_customer_ids', 1, 0, 'var', '', 0 ],
#            [ 'UserPhone',      'Phone',      'telephonenumber', 1, 0, 'var', '', 0 ],
#            [ 'UserAddress',    'Address',    'postaladdress',   1, 0, 'var', '', 0 ],
#            [ 'UserComment',    'Comment',    'description',     1, 0, 'var', '', 0 ],
        ],
    };





    # ---------------------------------------------------- #
    # ---------------------------------------------------- #
    #                                                      #
    #           End of your own config options!!!          #
    #                                                      #
    # ---------------------------------------------------- #
    # ---------------------------------------------------- #
}

# ---------------------------------------------------- #
# needed system stuff (don't edit this)                #
# ---------------------------------------------------- #
use strict;
use warnings;

use vars qw(@ISA $VERSION);
use Kernel::Config::Defaults;
push (@ISA, 'Kernel::Config::Defaults');

use vars qw(@ISA $VERSION);
$VERSION = qw($Revision: 1.21 $)[1];

# -----------------------------------------------------#

--
Best regards