Erro ingressando XP no samba + ldap

Quando tento ingressar um XP no samba + ldap, eu recebo a seguinte mensagem:

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Erro durante a tentativa de ingresso no dominio "labs"
O nome da rede especificado não está mais disponível.
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Essa msg eh dada após informar o usuário e senha.

Esse é o trecho de um dos arquivos de log:
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[2006/09/19 16:30:13, 3] smbd/sesssetup.c:reply_sesssetup_and_X_spnego(633)
Doing spnego session setup
[2006/09/19 16:30:13, 3] smbd/sesssetup.c:reply_sesssetup_and_X_spnego(664)
NativeOS=[Windows 2002 Service Pack 2 2600] NativeLanMan=[Windows 2002 5.1] PrimaryDomain=[]
[2006/09/19 16:30:13, 3] libsmb/ntlmssp.c:ntlmssp_server_auth(647)
Got user=[ root] domain=[labs] workstation=[ADM_TI_004] len1=24 len2=24
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outro log:
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[2006/09/19 16:03:31, 3] smbd/service.c:close_cnum(885)
adm_ti_004 (192.168.0.149) closed connection to service IPC$
[2006/09/19 16:03:31, 3] smbd/connection.c:yield_connection(69)
Yielding connection to IPC$
[2006/09/19 16:03:31, 3] smbd/sec_ctx.c:set_sec_ctx(288)
setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2006/09/19 16:03:52, 3] smbd/process.c:timeout_processing(1447)
timeout_processing: End of file from client (client has disconnected).
[2006/09/19 16:03:52, 3] smbd/sec_ctx.c:set_sec_ctx(288)
setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2006/09/19 16:03:52, 2] smbd/server.c:exit_server(614)
Closing connections
[2006/09/19 16:03:52, 3] smbd/connection.c:yield_connection(69)
Yielding connection to
[2006/09/19 16:03:52, 3] smbd/server.c:exit_server(655)
Server exit (normal exit)
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[2006/09/19 16:08:46, 3] lib/util_seaccess.c:se_access_check(250)
[2006/09/19 16:08:46, 3] lib/util_seaccess.c:se_access_check(251)
se_access_check: user sid is S-1-5-21-2075056165-4197823942-2122372495-3000
se_access_check: also S-1-5-21-2075056165-4197823942-2122372495-1001
se_access_check: also S-1-1-0
se_access_check: also S-1-5-2
se_access_check: also S-1-5-11
se_access_check: also S-1-5-32-544
[2006/09/19 16:08:46, 3] printing/printing.c:start_background_queue(1379)
start_background_queue: Starting background LPQ thread
[2006/09/19 16:08:46, 2] smbd/server.c:open_sockets_smbd(336)
waiting for a connection
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Obrigado a todos,
Lucas