troubles with W2K and Samba

[Radek Bursztynowski]

Welcome!

This is my firs day on this list.

My problem:
I can't use Samba server from PC with W2K. I see Samba server but when
I try come into this server I receive warning "The account is not
authorized to login from this station".

I use Samba 2.0.7 with Linux.
I set "security = user" option in my smb.conf file.
I modified windows registers 
[HKLM\System\CurrentControlSet\Services\Rdr\Parameters]
"EnablePlainTextPassword"=deword:00000001
and nothing.
What interesting? PC with W98 works properly.
What can I do to solve this problem?

Radek