samba - Feb 2002 - Winbind Issue

Hello everybody,

recently I installed Samba 2.2.3a incl. winbind. I configured winbind to use
user- and group-information from a Windows-2000 Server Active Directory.
All this works fine and I managed to import user- and group-accounts, so
when I hit

    wbinfo -u

I get (e.g.) :

    NTDOMAIN+oliver.neumann

as a valid user. Now I try to login via winbind with that user

    wbinfo -a NTDOMAIN+oliver.neumann%test

and I get :

    plaintext password authentication succeeded
    challenge/response password authentication failed
    Could not authenticate user NTDOMAIN+oliver.neumann%test with
challenge/response

Why does challenge/response passwd. auth. fails? But the real problem is,
that I
cannot restrict a folder to a specific Domain-User.

I tried this :

    -x-x-x- smb.conf -x-x-x-
    [...]
    [test]
        comment = WinbindTest
        path = /test
        valid users = NTDOMAIN+oliver.neumann
        read only = No
        directory mask = 0700
    -x-x-x- smb.conf -x-x-x-

but when I try to connect to the share (via Windows 2000) "test" I get
an
authentification
error, even though I tried to login via "oliver.neumann" and password
AND
"NTDOMAIN+oliver.neumann" and password. What am I doing wrong?

Thanks for your help.

Sincerly,
Oliver Neumann