samba - Sep 2007 - Samba don't see DC

Hi

now, i have added my server to my AD, the command net ads join work's and
with kerberos, i can verify login/pass.

But when i sent wbinfo -t i have:

[root@server samba]# wbinfo -t
checking the trust secret via RPC calls failed
error code was NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND (0xc0000233)
Could not check secret

i don't know why he don't see the DC ... anyone have a idea ?

into log, i have:

[root@gw samba]# [2007/09/14 17:45:26, 6]
nsswitch/winbindd.c:new_connection(638)
  accepted socket 17
[2007/09/14 17:45:26, 10] nsswitch/winbindd.c:process_request(324)
  process_request: request fn INTERFACE_VERSION
[2007/09/14 17:45:26, 3]
nsswitch/winbindd_misc.c:winbindd_interface_version(454)
  [    0]: request interface version
[2007/09/14 17:45:26, 10] nsswitch/winbindd.c:process_request(324)
  process_request: request fn WINBINDD_PRIV_PIPE_DIR
[2007/09/14 17:45:26, 3] nsswitch/winbindd_misc.c:winbindd_priv_pipe_dir(487)
  [    0]: request location of privileged pipe
[2007/09/14 17:45:26, 6] nsswitch/winbindd.c:new_connection(638)
  accepted socket 18
[2007/09/14 17:45:26, 10] nsswitch/winbindd.c:process_request(324)
  process_request: request fn CHECK_MACHACC
[2007/09/14 17:45:26, 3]
nsswitch/winbindd_misc.c:winbindd_check_machine_acct(35)
  [    0]: check machine account
[2007/09/14 17:45:26, 10]
nsswitch/winbindd_cache.c:cache_retrieve_response(1534)
  Retrieving response for pid 14737


into my AD, see my server into machine account

thanks for your help