[Samba] Sage and oplocks

[terry at bluelight.org.uk]

Hello im running sage line50 version 11 on a freebsd machine with samba
version 2x
My smb.conf for share looks like this
[sage]
   path = /40gb/sage
   writeable = yes
   browseable = no
   create mask = 0777
   directory mask = 0777
   veto oplock files = /*.mdb/*.MDB/*.ldb/*.LDB
   locking = yes
   share modes = yes

The problem is when two users for example try and update customer records
one of them will get a message saying the file has been locked and a count
down appears trouble is the count down goes into a loop and both users get
stuck
The workstations are nt4 with sp6
After enabling oplocking in samba is there any thing to be done with
windows clients ?
And allso would upgrading to samba version 3x help at all
Terry