[Samba] [HELP] Problem with oplocks break failed

[Aldyth Maharsha]

Hi list, i'm have trouble with oplocks break failed for file xxx

I'm using samba running in ubuntu natty 11.04  with separate ldap server :

:~# dpkg -l | grep samba
ii  libcrypt-smbhash-perl           0.12-3
generate LM/NT hash of a password for samba
ii  samba                           2:3.5.8~dfsg-1ubuntu2.2
SMB/CIFS file, print, and login server for Unix
ii  samba-common                    2:3.5.8~dfsg-1ubuntu2.2
common files used by both the Samba server and client
ii  samba-common-bin                2:3.5.8~dfsg-1ubuntu2.2
common files used by both the Samba server and client
ii  samba-doc                       2:3.5.8~dfsg-1ubuntu2.2            Samba
documentation

My problems is strange, when user open file(office file like excel, word)
directly from server it is normal but whe user close that file it is
extremely slow. But copy files from and to samba server is normal, just
"stream" office file from server. Only some user have trouble like that, not
all of user and some file like that not all of office file. It is very
strange for me because just some user(2 user exactly from 100++ user) and
some file office if i'm close that it is extremely slow not all office file.

Samba log :

  smbd/oplock.c:322(oplock_timeout_handler)
  Oplock break failed for file Copy of DOORPRIZE.xls -- replying anyway


smb.conf :
[global]
        workgroup = AAA
        netbios name = SUNKO08
        security = user
        enable privileges = yes
        server string = %h server
        encrypt passwords = Yes

        unix password sync = yes
        ldap passwd sync = yes
        passwd program = /usr/sbin/smbldap-passwd -u "%u"
        passwd chat = "Changing *\nNew password*" %n\n "*Retype new
password*" %n\n"

        log level = 0
        syslog = 0
        log file = /var/log/samba/log.%U
        max log size = 100000
        time server = Yes
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        dns proxy = no
        mangling method = hash2
        Dos charset = CP932
        Unix charset = UTF-8
        logon script = logon.bat
        logon drive = H:
        logon home =
        logon path =
        domain logons = Yes
        domain master = Yes
        os level = 65
        preferred master = Yes
        wins support = yes
        passdb backend = ldapsam:ldap://sunko02.sunko.local/
        ldap admin dn = cn=admin,dc=sunko,dc=local
        ldap suffix = dc=sunko,dc=local
        ldap group suffix = ou=groups
        ldap user suffix = ou=people
        ldap machine suffix = ou=computer
       add user script = /usr/sbin/smbldap-useradd -m "%u"
        delete user script = /usr/sbin/smbldap-userdel "%u"
        add machine script = /usr/sbin/smbldap-useradd -t 0 -w "%u"
        add group script = /usr/sbin/smbldap-groupadd -p "%g"
        delete group script = /usr/sbin/smbldap-groupdel "%g"
        add user to group script = /usr/sbin/smbldap-groupmod -m "%u" "%g"
        delete user from group script = /usr/sbin/smbldap-groupmod -x "%u"
"%g"
        set primary group script = /usr/sbin/smbldap-usermod -g '%g' '%u'
        admin users = domainadm
        ldap ssl = no
        load printers = Yes
        create mask = 0640
        directory mask = 0750
        nt acl support = No
        printing = cups
        printcap name = cups
        deadtime = 10
        guest account = nobody
        map to guest = Bad User
        dont descend = /proc,/dev,/etc,/lib,/lost+found,/initrd
        show add printer wizard = yes
        preserve case = yes
        short preserve case = yes
        case sensitive = no

Any idea from my case?..thanks before :-)

Best Regards,
Aldyth M