[Users] Openser Administrator misses /var/log/openser

Openser Administrator says: No such file or directory - /var/log/openser - I agree with that! Where do I set it? tail /var/log/messages Sep 27 19:59:41 taipei /usr/local/sbin/openser[13042]: ERROR:registrar:update_contacts: invalid cseq for aor <7111> Sep 27 19:59:41 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7211> Sep 27 19:59:44 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7111> Sep 27 19:59:47 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7211> Sep 27 19:59:50 taipei /usr/local/sbin/openser[13042]: ERROR:registrar:update_contacts: invalid cseq for aor <7111> Sep 27 19:59:59 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7113> Sep 27 19:59:59 taipei /usr/local/sbin/openser[13042]: ERROR:registrar:update_contacts: invalid cseq for aor <7211> Sep 27 20:00:02 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7111> Sep 27 20:00:03 taipei /usr/local/sbin/openser[13042]: ERROR:registrar:update_contacts: invalid cseq for aor <7113> Sep 27 20:00:07 taipei /usr/local/sbin/openser[13044]: ERROR:registrar:update_contacts: invalid cseq for aor <7113> BTW, what do these error messages mean? bye Ronald