samba - Apr 2005 - Incorrect password or unknown username error when accessing a share

Hi,

I have configured Samba to be a part of a NT style domain. The machine was able
to join the group fine (great support from this group. Thanks!). ADS or LDAP are
not used and the configuration relies on the Windows PDC to perform user
authentication.

Promblem 1) 
When a user tries to access the samba server, a dialog box pops-up saying
"Incorrect password or unknown username" for \\samba-server and
prompts me for the user name password. When I put in
<Domain-name>\username it logs me in fine. How can I avoid forcing the
users to put in domain name before their username?

Problem 2)
After accessing the server, when I access a share on the server it prompts me
for the user name password again. On putting the same user name password as
earlier, this keeps on prompting me again as if it did not like the combination.
I have tried adding and removing users from /etc/passwd and smbpasswd but have
the same problem over. Can someone help identify what is the right combination
it is looking for or if there is anything I need to add to the smb.conf?

An extract of the smb.conf file is provided below for reference.

Your help on these issues is very much appreciated.

Thanks,

Ash


[global]
        dns proxy = no
        debug timestamp = yes
        encrypt passwords = yes
        idmap gid = 15000-20000
        socket options = TCP_NODELAY
        max log size = 1024
        password server = <password server>
        idmap uid = 15000-20000
        debug level = 3
        security = domain
        server string = Samba Server
        workgroup = <domain-name>
        log level = 3
        log file = /usr/local/samba/var/log.%m
        netbios name = appserver7
        load printers = yes
        os level = 33
        default = share
        winbind use default domain = Yes

[homes]
   comment = Home Directories
   valid users = %S
   browseable = no
   writable = yes

[share]
path = /share
comment = Solaris share
valid users = @Accounts
guest ok = Yes
read only = No