I connect to samba from XP or W2K, create file try to add ACE to the file's ACL
After the submit the ACE disapear

The smb.conf is
   workgroup = CIFS-DOMAIN
        wins server = 172.16.20.227
        netbios name = aurora
        security = domain
#       security = ads
        realm = CIFS-DOMAIN.COM
        password server = *
        server string = CLLF
        load printers = no
        socket options = TCP_NODELAY
        local master = no
        domain master = no
        lock directory = /tmp
        name resolve order = wins host bcast
        dns proxy = yes
        winbind uid = 1-65535
        winbind gid = 1-65535
        idmap uid = 1-65535
        idmap gid = 1-65535
        log file = /var/tmp/samba_log.%m
        max log size = 100
        log level = 10
        syslog = 0
        client use spnego = yes
[cifs1]
        path = /export/cifs1
        read only = No
        guest ok = Yes
        use sendfile = Yes