samba - Dec 2003 - Wrong password lenght when joining domain

Hi

I did a net rpc vampire from a NT4 Domain, all the 
machines/users/groups imported fine, the problem is, I can't join the 
new domain fromt the w2k workstations :

I get this error at debug level 5 :

[2003/12/11 09:35:40, 5] rpc_server/srv_samr_nt.c:set_user_info_pw(2873)
   Attempting administrator password change for user GRAVEUR-SRV$
[2003/12/11 09:35:40, 0] libsmb/smbencrypt.c:decode_pw_buffer(501)
   decode_pw_buffer: incorrect password length (-1908397134).
[2003/12/11 09:35:40, 0] libsmb/smbencrypt.c:decode_pw_buffer(502)
   decode_pw_buffer: check that 'encrypt passwords = yes'
[2003/12/11 09:35:40, 5] rpc_parse/parse_prs.c:prs_debug(82)
   000000 samr_io_r_set_userinfo
[2003/12/11 09:35:40, 5] rpc_parse/parse_prs.c:prs_ntstatus(665)
       0000 status: NT_STATUS_ACCESS_DENIED
[2003/12/11 09:35:40, 5] rpc_server/srv_pipe.c:api_rpcTNP(1549)
   api_rpcTNP: called samr successfully

I checked the archives but did not find a solution to this, please help 
me,

thanks

Charles Hamel