samba - May 2006 - access from w2k professional client to sambaserver fails

Hi,

how can I access to a sambaserver from a w2k-client. I've installed the 
latest sambaversion.
On the w2k-client I see the sambaserver in the networksurrounding but I 
can't make a connection
to the share on the linuxhost. A special acl-file is not installed on 
the linuxhost.

What is nessessary that the connection to the sambaserver works properly.

Regards,
Ruprecht