samba - Sep 2004 - Unable to see shares on Samba server from Windows XP home machine

I am trying to set up a samba server with a Window XP Home client. I'm 
able to access the share from the Linux server, and can 'see' the samba 
server in the Windows client, but when I attempt to access the server 
from the XP client, I get a message that says:

\\server is not accessible. You might not have permission to use this 
resource.
Contact the administrator to find out if you have access permissions.

No service is operating at the endpoint on the remote system


My share name is /samba and permsions are 777.


This command works fine from the server side:
smbclient -L servername -N

This is my (simple) smb.conf file:

[global]
    workgroup =  workgroupname
    netbios name = servername
    password server = None
    guest ok = yes
    guest account = dave
    security = SHARE

[samba]
    path = /samba
    writeable = yes
    guest ok = yes

I would think that what I'm trying to do would be pretty simple. Has 
anyone else run into this?