[Samba] keeps asking for username and password - help

[Marcus James Bloodworth]

I have samba 2.2.1
Redhat 7.2
The samba is set up as Share level access.
It keeps asking for the username and password when i try to connect with
win98 and win2k clients.  I cannot connect.
here is smb.conf:

# Samba config file created using SWAT

# from 0.0.0.0 (0.0.0.0)

# Date: 2003/01/20 03:45:14

# Global parameters

[global]

workgroup = GROUP1

netbios name = PLANROOM.TV

netbios aliases = planroom

server string = Samba Server

interfaces = 192.168.9.82/255.255.255.0

security = SHARE

encrypt passwords = Yes

update encrypted = Yes

null passwords = Yes

log file = /var/log/samba/%m.log

max log size = 0

socket options = SO_KEEPALIVE SO_BROADCAST TCP_NODELAY SO_SNDBUF=8192
SO_RCVBUF=8192

local master = No

domain master = False

dns proxy = No

default service = public

remote announce = 192.168.9.120/group1 192.168.9.3/group1

guest account = nobody, administrator

printing = lprng

[homes]

comment = Home Directories

valid users = %S

read only = No

create mask = 0664

directory mask = 0775

browseable = No

[printers]

comment = All Printers

path = /var/spool/samba

printable = Yes

browseable = No

[public]

path = /home/public

valid users = administrator, marcusb

admin users = administrator, marcusb

write list = administrator, marcusb

read only = No

guest ok = Yes

[win]

path = /mnt/win

guest account = nobody, administrator, marcusb, root

valid users = administrator,,root,,marcusb, at root,, at marcusb,, at administrator

read only = No

guest ok = Yes