[Samba] problem with samba 3.5.6 try to join W2K8

[zorg]

hi,
  I trying to join a samba 3.5.6 (debian) on a domain W2K8 without 
kerberos followin the wiki page 
(http://wiki.samba.org/index.php/Samba_&_Active_Directory)
using net ads join i've got this error Failed to join domain: failed to 
join domain 'MYDOMAIN.COM' over rpc: NT_STATUS_NOT_SUPPORTED

conf in /etc/smb.conf
   workgroup = MYDOMAIN

    server string = %h server
# allow trusted domains = no
    realm =   MYDOMAIN.COM
    password server = mntphone001.mydomain.com
         preferred master = no
    security = ADS
    encrypt passwords = yes
    log level = 5
    log file = /var/log/samba/%m
    max log size = 50
    printcap name = cups
    printing = cups
    winbind enum users = Yes
    winbind enum groups = Yes
    winbind use default domain = Yes
    winbind nested groups = Yes
    winbind separator = +
    idmap uid = 2000-20000
    idmap gid = 2000-20000
     client use spnego = yes
   ;template primary group = "Domain Users"
    template shell = /bin/bash
    auth methods = winbind


log i have when i do
net ads join  -Umylogin%passwd -S mntphone001.mydomain.com -d 2
   rlimit_max: rlimit_max (1024) below minimum Windows limit (16384)
[2011/03/02 13:24:00.801641,  2] lib/interface.c:340(add_interface)
   added interface eth0 ip=fe80::213:72ff:fe56:6db6%eth0 
bcast=fe80::ffff:ffff:ffff:ffff%eth0 netmask=ffff:ffff:ffff:ffff::
[2011/03/02 13:24:00.801787,  2] lib/interface.c:340(add_interface)
   added interface eth0 ip=172.23.36.4 bcast=172.23.36.255 
netmask=255.255.255.0
[2011/03/02 13:24:00.802018,  1] libnet/libnet_join.c:1947(libnet_Join)
   libnet_Join:
       libnet_JoinCtx: struct libnet_JoinCtx
           in: struct libnet_JoinCtx
               dc_name                  : 'mntphone001.mydomain.com'
               machine_name             : 'MNTSLX001'
               domain_name              : *
                   domain_name              : 'MYDOMAIN.COM'
               account_ou               : NULL
               admin_account            : 'mylogin'
               admin_password           : *
               machine_password         : NULL
               join_flags               : 0x00000023 (35)
                      0: WKSSVC_JOIN_FLAGS_IGNORE_UNSUPPORTED_FLAGS
                      0: WKSSVC_JOIN_FLAGS_JOIN_WITH_NEW_NAME
                      0: WKSSVC_JOIN_FLAGS_JOIN_DC_ACCOUNT
                      0: WKSSVC_JOIN_FLAGS_DEFER_SPN
                      0: WKSSVC_JOIN_FLAGS_MACHINE_PWD_PASSED
                      0: WKSSVC_JOIN_FLAGS_JOIN_UNSECURE
                      1: WKSSVC_JOIN_FLAGS_DOMAIN_JOIN_IF_JOINED
                      0: WKSSVC_JOIN_FLAGS_WIN9X_UPGRADE
                      0: WKSSVC_JOIN_FLAGS_ACCOUNT_DELETE
                      1: WKSSVC_JOIN_FLAGS_ACCOUNT_CREATE
                      1: WKSSVC_JOIN_FLAGS_JOIN_TYPE
               os_version               : NULL
               os_name                  : NULL
               create_upn               : 0x00 (0)
               upn                      : NULL
               modify_config            : 0x00 (0)
               ads                      : NULL
               debug                    : 0x01 (1)
               use_kerberos             : 0x00 (0)
               secure_channel_type      : SEC_CHAN_WKSTA (2)
[2011/03/02 13:24:00.814776,  1] libnet/libnet_join.c:1978(libnet_Join)
   libnet_Join:
       libnet_JoinCtx: struct libnet_JoinCtx
           out: struct libnet_JoinCtx
               account_name             : NULL
               netbios_domain_name      : 'MYDOMAIN'
               dns_domain_name          : 'mydomain.com'
               forest_name              : 'root.com'
               dn                       : NULL
               domain_sid               : *
                   domain_sid               : 
S-1-5-21-796845957-790525478-725345543
               modified_config          : 0x00 (0)
               error_string             : 'failed to join domain 
'MYDOMAIN.COM' over rpc: NT_STATUS_NOT_SUPPORTED'
               domain_is_ad             : 0x01 (1)
               result                   : WERR_NOT_SUPPORTED
[2011/03/02 13:24:00.815116,  2] utils/net.c:916(main)
   return code = -1
Failed to join domain: failed to join domain 'MYDOMAIN.COM' over rpc: 
NT_STATUS_NOT_SUPPORTED