samba - Jan 2001 - Problem for users mapping Samba 2.0.7 shares on Win2k Server

I'm having the following problem as stated in the subject line. The
details are provided below.

-------------------------------------------------------
Samba 2.0.7 runs on Solaris 2.5.1 as the main server providing the
shares.

There is a Win2k server which users access via citrix ICA client to
modify their files via Office 2K.

The problem is that no user can permanently map a drive on Win2k  to a
share. i.e. It is only valid for the session.

 At their next login,and every login thereafter,  they are asked to type
in their password to map the drive again.

I have modified the Win2K server registry as per :

Value Name: EnablePlainTextPassword
       Data Type: REG_DWORD
       Data: 1

       Registry Key


HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkStation\Parameters

I don't care about encrypted passwords..yet...: -)

smb.conf is below.
------------------------
[global]
        workgroup = TEST
        netbios aliases = TEST_OTHER
        config file = /opt/samba/lib/smb.conf.%L
        security = server
        admin users = root
        case sensitive
        log file = /opt/samba/log/%m
        max log size = 50
        load printers = yes
        server string = TESTSERVER

[Office]
        comment = Office
        path = /usr4/data
        public = no
        writable = yes
        create mask = 0777
        browseable = yes

What am I doing/is wrong here?

Thanks

--
 Nimish Philip (I.T. Department)
 Kromberg & Schubert Brits South Africa (Pty) Ltd.
 Phone  : +27 12 2501100 ext: 1117
 Fax    : +27 12 2501122