Problem with W2K -Login

[epn]

Hi all,
my PDC under Samba works fine (with 25 x Win9X).
Now I try to login with W2K.
I Have Samba 2.2.1a and W2K sp1 !

First adding the account to the UNIX-password-file
# adduser -d /dev/null -s /bin/false <ntmachine$>
Second adding the smbpassword
# smbpasswd -a -m <ntmachine>


The error message from Windows is:
"Unknown user or bad password"

"/var/log/samba/log.smbd" says
"startsmbfilepwent_internal: unable to open file /etc/samba/smbpasswd
   Error was Permission denied"


What can I do???

Thanks
Sebastian Wern