[Samba] pam_winbind

[cj]

Would any one know what these errors are and how they are created?
I am using pam_winbind in my system-auth file.
But when I try and telnet onto the machine, I get this error message in the
log.

Sep 18 16:41:47 yamin pam_winbind[1160]: request failed, PAM error was 4, NT
error was NT_STATUS_INVALID_PARAMETER
Sep 18 16:41:47 yamin pam_winbind[1160]: internal module error (retval = 4,
user = `cj'

Thanks