[Samba] simple configuration problem

[Mauro Sacchetto]

This is smb.conf:

[global]
        workgroup = workgroup
        netbios name = darkstar
        security = share
        log file = /var/log/samba.%m
        max log size = 50

[homes]
        comment = Home Directories
        browseable = yes
        read only = No

[printers]
        comment = All Printers
        path = /var/spool/samba
        guest ok = yes
        printable = yes
        browseable = yes

However, when I try to read "homes on samba 3.0.22"
from Win, appears a window that has as username DARKSTAR/Guest
and ask me a password. Why does it ask me a password,
if I set "share"? And which can be that password
for guest, for it's nobody user?

Thanx!
M.