[Samba] Join to domain

[sandy.napoles at eccmg.cupet.cu]

Helo list, i follow the step in the URL
https://wiki.samba.org/index.php/Samba4_joining_a_domain, when i going to
run this tool bin/samba-tool domain join samba.example.com DC
-Uadministrator --realm=samba.example.com i have the follow error


root at bdc:/usr/local/samba/bin# ./samba-tool domain join eccmg.cupet.cu DC
-Usand
        y --realm=eccmg.cupet.cu
Finding a writeable DC for domain 'eccmg.cupet.cu'
Found DC siscont.eccmg.cupet.cu
Password for [WORKGROUP\sandy]:
Failed to bind - LDAP client internal error: NT_STATUS_INVALID_PARAMETER
Failed to connect to 'ldap://siscont.eccmg.cupet.cu' with backend 'ldap':
(null)
ERROR(ldb): uncaught exception - None
  File
"/usr/local/samba/lib/python2.6/site-packages/samba/netcmd/__init__.py",
line 167, in _run
    return self.run(*args, **kwargs)
  File
"/usr/local/samba/lib/python2.6/site-packages/samba/netcmd/domain.py",
line 162, in run
    machinepass=machinepass)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/join.py", line
927, in join_DC
    machinepass)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/join.py", line
71, in __init__
    credentials=ctx.creds, lp=ctx.lp)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/samdb.py", line
58, in __init__
    options=options)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/__init__.py",
line 113, in __init__
    self.connect(url, flags, options)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/samdb.py", line
73, in connect
    options=options)



somebody can helpme