why oplock is broken???

[Mailing Manager]

Hi all,
        i'm runnign 2.07 whti good result, but only for one application (a
stupid prgram that ahev several files of data) i ahve problems.
The log report the oplocks break, but the only thing tha i know is about
blocking locks = no, that is needed fo teh applciation to run,.
Th eusers report a wait of some seconds and then an error regarding that the
file is openend o locked by another users...

[2000/06/06 15:53:40, 0] smbd/oplock.c:oplock_break(976)
  oplock_break: receive_smb timed out after 30 seconds.
  oplock_break failed for file Tbsc/prog/UTV8IU (dev = 803, inode = 424227).
[2000/06/06 15:53:40, 0] smbd/oplock.c:oplock_break(1050)
  oplock_break: client failure in oplock break in file Tbsc/prog/UTV8IU
[2000/06/06 15:53:40, 0] smbd/reply.c:reply_lockingX(4163)
  reply_lockingX: Error : oplock break from client for fnum = 7924 and no
oplock granted on this file (Tbsc/prog/UTV8IU).



How to solve this???
thanks