Problem while authenticating from Windows NT workstation.....Pl help me ...

[nisarg]

 Hello everybody..
 I'm new user of SAMBA.
 i had configured samba on linux 6.2.
 i have mix user of Windows 9x and windows NT workstation.
 the users using windows 9x are able to get authenticate on my linux box
 properly but
 while going authentication from windows NT workstation it is giving error.

 ERROR IS ... No domain is available to authenticate user or may be password
 is wrong
                         contact administrator.

 pl can any one help me.
 waiting for reply
 With Thanks and regards


Nilesh