cobbler login failed

cobbler_login_traceback

[root@ops-2 ~]# cobbler  help 
Traceback (most recent call last):
  File "/usr/bin/cobbler", line 35, in <module>
    sys.exit(app.main())
  File "/usr/lib/python2.6/site-packages/cobbler/cli.py", line 558, in main
    rc = cli.run(sys.argv)
  File "/usr/lib/python2.6/site-packages/cobbler/cli.py", line 202, in run
    self.token         = self.remote.login("", self.shared_secret)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1199, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1489, in __request
    verbose=self.__verbose
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1253, in request
    return self._parse_response(h.getfile(), sock)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1392, in _parse_response
    return u.close()
  File "/usr/lib64/python2.6/xmlrpclib.py", line 838, in close
    raise Fault(**self._stack[0])
xmlrpclib.Fault: <Fault 1: "<class 'cobbler.cexceptions.CX'>:'login failed'">

[root@ops-2 ~]# tail -f /var/log/cobbler/cobbler.log 
Fri May 31 23:02:14 2013 - INFO | Exception occured: <class 'cobbler.cexceptions.CX'>
Fri May 31 23:02:14 2013 - INFO | Exception value: 'login failed'
Fri May 31 23:02:14 2013 - INFO | Exception Info:
  File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1970, in _dispatch
    return method_handle(*params)
   File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1757, in login
    utils.die(self.logger, "login failed")
   File "/usr/lib/python2.6/site-packages/cobbler/utils.py", line 134, in die
    raise CX(msg)

Fri May 31 23:02:54 2013 - INFO | Exception occured: <class 'cobbler.cexceptions.CX'>
Fri May 31 23:02:54 2013 - INFO | Exception value: 'login failed'
Fri May 31 23:02:54 2013 - INFO | Exception Info:
  File "/usr/lib/python2.6/site-packages/cobbler/utils.py", line 126, in die
    raise CX(msg)

Fri May 31 23:02:54 2013 - INFO | Exception occured: <class 'cobbler.cexceptions.CX'>
Fri May 31 23:02:54 2013 - INFO | Exception value: 'login failed'
Fri May 31 23:02:54 2013 - INFO | Exception Info:
  File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1970, in _dispatch
    return method_handle(*params)
   File "/usr/lib/python2.6/site-packages/cobbler/remote.py", line 1757, in login
    utils.die(self.logger, "login failed")
   File "/usr/lib/python2.6/site-packages/cobbler/utils.py", line 134, in die
    raise CX(msg)

If it's a newly installed, did you set up your "default_password_crypted" in /etc/cobbler/settings?