OK, I am totally stuck. I am trying to use Samba to connect to a WinXP PC (called PCBENEDEN) and a Yoper PC (called PCLIEVEN). The WinXP is updated to the latest SP, Yoper V2.1 is also apt-getted to be fully updated.
My smb.conf looks like:

workgroup = THUIS
server string = PCLIEVEN
;   hosts allow = 192.168.1. 192.168.2. 127.
printcap name = cups
printing = cups

lock directory = /usr/local/samba/var/lock
guest account = bin
log file = /var/log/samba/log.smbd
max log size = 50

security = share
  encrypt passwords = yes
  smb passwd file = /etc/samba/smbpasswd

socket options = TCP_NODELAY SO_SNDBUF=8192 SO_RCVBUF=8192 

dns proxy = no
restrict anonymous = no
domain master = no
preferred master = no
max protocol = NT
ldap ssl = No
server signing = Auto

comment = All Printers
path = /var/spool/samba
browseable = no
# Set public = yes to allow user 'guest account' to print
guest ok = no
printable = yes

comment = Home Directories
browseable = no
read only = no

case sensitive = no
guest ok = yes
public = yes
msdfs proxy = no
path = /mnt/data/
The XP PC has the shared folders and a printer (Brother HL-5040) being shared. When I boot my Yoper PC to XP (it's a dual booot), everything works. When I use Yoper and I use smbclient -L PCBENEDEN I get:
Domain=[PCBENEDEN] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager]

        Sharename       Type      Comment
        ---------       ----      -------
        IPC$            IPC       Externe IPC
        print$          Disk      Printerstuurprogramma's
        SharedDocs      Disk
        ADMIN$          Disk      Beheer op afstand
        C$              Disk      Standaard-share
Domain=[PCBENEDEN] OS=[Windows 5.1] Server=[Windows 2000 LAN Manager]

        Server               Comment
        ---------            -------

        Workgroup            Master
        ---------            -------
So I cannot reach the printer. How can this???

Moreover, I cannot see my Linux box from the XP box in Network Neighbourhood or whatever. But when I do smbclient -L localhost, I can see my own shares. I already changed the requiresignorseal value in XP, but it didn't help.

So, to end:
1/ How can I see my printer connected to the XP box?
2/ How can I reach my Yoper box?