Samba Error --- Shared Folder Show in All Computer on LAN

[silentsilent]

Hi..

im using ubuntu server 8.04 and samba 3.0.28a-1ubuntu4.7

i think my smb.conf configuration is messed up but is work..
my destination is read write for randhi only... read only to other user.. but recently something is wrong.

My shared folder in samba show in all computer in my network (LAN) so the other computer (wind*wsxp) shared folder is gone and just showing folder from samba.

My server work as router and firewall too, and this is the schema:

ADSLmodem (bridge) --- ubuntu server --- switch --- all other computers

my server ip is 192.168.0.1 ( as a wins server )
client ip is 192.168.0.5-32 ( wins assigned via dhcp server )

wonder what the problem is

My smb.conf :
[global]
name resolve order = hosts wins bcast
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=8192 SO_SNDBUF=8192
announce version = 5.0
username map = /etc/samba/smbusers
null passwords = yes
encrypt passwords = yes
passdb backend = tdbsam
wins support = true
netbios name = mail
server string = Indomulya server
printing = CUPS
workgroup = INDOMULYA
syslog only = yes
os level = 20
printcap name = CUPS
syslog = 1
security = user
; General server settings





; NOTE: If you need access to the user home directories uncomment the
; lines below and adjust the settings to your hearts content.
;[homes]
;valid users = %S
;create mode = 0600
;directory mode = 0755
;browseable = no
;read only = no
;veto files = /*.{*}/.*/mail/bin/

; NOTE: Only needed if you run samba as a primary domain controller.
; Not needed as this config doesn't cover that matter.
;[netlogon]
;path = /var/lib/samba/netlogon
;admin users = Administrator
;valid users = %U
;read only = no

; NOTE: Again - only needed if you're running a primary domain controller.
;[Profiles]
;path = /var/lib/samba/profiles
;valid users = %U
;create mode = 0600
;directory mode = 0700
;writeable = yes
;browseable = no

; NOTE: Inside this place you may build a printer driver repository for
; Windows - I'll cover this topic in another HOWTO.
[print$]
path = /var/lib/samba/printers
browseable = yes
guest ok = yes
read only = yes
write list = root
create mask = 0664
directory mask = 0775

[printers]
path = /tmp
printable = yes
guest ok = yes
browseable = no

; Uncomment if you need to share your CD-/DVD-ROM Drive
;[DVD-ROM Drive]
;path = /media/cdrom
;browseable = yes
;read only = yes
;guest ok = yes

[Backup]
read list = nobody,@nogroup
wide links = no
invalid users = root,samba,@root,@samba
path = /mnt/sda5/backup
write list = randhi,silent,r4ndhi,@randhi,@silent,@r4ndhi
force group = randhi
force user = randhi
comment = File Backup ( read only )
valid users = randhi,nobody,silent,r4ndhi,@randhi,@nogroup,@sile nt,@r4ndhi
create mode = 0644
public = yes
user = randhi,nobody,silent,r4ndhi,@randhi,@nogroups,@sil ent,@r4ndhi
directory mode = 0755

[BackupLVM]
guest account = randhi
writeable = yes
wide links = no
path = /backup
write list = randhi,@randhi
force group = randhi
force user = randhi
comment = File Backup ( read only )
valid users = randhi,@randhi
user = randhi,@randhi
public = yes
create mode = 0644
directory mode = 0755

[Master Software]
read list = nobody,@nogroup
wide links = no
invalid users = root,samba,@root,@samba
path = /mnt/sda6/master/software
write list = randhi,silent,r4ndhi,@randhi,@silent,@r4ndhi
force group = randhi
force user = randhi
comment = Master Software ( Read Only )
valid users = randhi,nobody,silent,r4ndhi,@randhi,@nogroup,@sile nt,@r4ndhi
create mode = 0644
public = yes
user = randhi,nobody,silent,r4ndhi,@randhi,@nogroups,@sil ent,@r4ndhi
directory mode = 0755

[ISO Files]
read list = nobody,@nogroup
wide links = no
invalid users = root,samba,@root,@samba
path = /mnt/sda6/master/ISO
write list = randhi,silent,r4ndhi,@randhi,@silent,@r4ndhi
force group = randhi
force user = randhi
comment = Kumpulan CD image / ISO ( Read Only )
valid users = randhi,nobody,silent,r4ndhi,@randhi,@nogroup,@sile nt,@r4ndhi
create mode = 0644
public = yes
user = randhi,nobody,silent,r4ndhi,@randhi,@nogroups,@sil ent,@r4ndhi
directory mode = 0755

[Acronis Image]
read list = nobody,@nogroup
wide links = no
invalid users = root,samba,@root,@samba
path = /mnt/sda6/master/acronis
write list = randhi,silent,r4ndhi,@randhi,@silent,@r4ndhi
force group = randhi
force user = randhi
comment = Backup image seluruh komputer Indo Mulya ( Read Only )
valid users = randhi,nobody,silent,r4ndhi,@randhi,@nogroup,@sile nt,@r4ndhi
create mode = 0644
public = yes
user = randhi,nobody,silent,r4ndhi,@randhi,@nogroups,@sil ent,@r4ndhi
directory mode = 0755

[Acer 6292]
read list = nobody,@nogroup
wide links = no
invalid users = root,samba,@root,@samba
path = /acer6292
write list = randhi,silent,r4ndhi,@randhi,@silent,@r4ndhi
force group = randhi
force user = randhi
comment = Backup image seluruh komputer randhi
valid users = randhi,nobody,silent,r4ndhi,@randhi,@nogroup,@sile nt,@r4ndhi
create mode = 0644
public = yes
user = randhi,nobody,silent,r4ndhi,@randhi,@nogroups,@sil ent,@r4ndhi
directory mode = 0755

[Shared to All]
force user = nobody
comment = Untuk shared ke semua orang ( read write )
wide links = no
writeable = yes
public = yes
path = /mnt/sda6/shared
force group = nogroup