[Samba] Couldn't find service xxxx?

[vs]

Hi,


I've got a strange problem.
All users have 770 access to two shares.
Their home directory is not used.

There is a user jh working on the samba server, has access to all and 
suddenly he has no access at all. He can still see the two shares, but 
that's it.He doesn't get a permission denied.
More something like 'couldn't find share, seek your administrator,.....".
When I log out and back in the problem is solved, temporarely.

I have a "samba.log.jh" log file => with error "couldn't find service jh".
But when the troubles begin I also see sometimes writing to 
samba.log.nobody???????
Although I have "guest ok = no".
Beneath are pieces of the log files.

In samba.log.jh
[2002/02/07 09:23:42, 0] smbd/service.c:make_connection(238)
  prob01 (10.6.20.1) couldn't find service jh
[2002/02/07 09:23:42, 0] smbd/service.c:make_connection(238)
  prob01 (10.6.20.1) couldn't find service jh
[2002/02/07 09:23:42, 0] smbd/service.c:make_connection(238)
  prob01 (10.6.20.1) couldn't find service jh



[2002/02/07 18:23:34, 2] smbd/close.c:close_normal_file(203)
  jh closed file Accfiles/PROG/Procert3_01.ldb (numopen=2)
[2002/02/07 18:23:34, 2] lib/access.c:check_access(316)
  Allowed connection from prob01.probeton (10.6.20.1)
[2002/02/07 18:23:35, 0] smbd/service.c:make_connection(238)
  prob01 (10.6.20.1) couldn't find service jh
[2002/02/07 18:23:35, 0] smbd/service.c:make_connection(238)
  prob01 (10.6.20.1) couldn't find service jh

This goes on and on.

In samba.log.nobody
[2002/02/07 09:23:08, 0] smbd/oplock.c:oplock_break(769)
  oplock_break: receive_smb timed out after 30 seconds.
  oplock_break failed for file Dbase/dbase.exe (dev = 901, inode = 843758).
[2002/02/07 09:23:08, 0] smbd/oplock.c:oplock_break(843)
  oplock_break: client failure in oplock break in file Dbase/dbase.exe
[2002/02/07 09:23:39, 0] lib/util_sock.c:read_socket_data(478)
  read_socket_data: recv failure for 4. Error = Connection reset by peer
[2002/02/07 09:23:39, 2] smbd/server.c:exit_server(448)
  Closing connections
[2002/02/07 09:23:39, 1] smbd/service.c:close_cnum(644)
  prob01 (10.6.20.1) closed connection to service netlogon
[2002/02/07 09:23:39, 1] smbd/service.c:close_cnum(644)
  prob01 (10.6.20.1) closed connection to service Probeton-Seco
[2002/02/07 09:23:39, 1] smbd/service.c:close_cnum(644)
  prob01 (10.6.20.1) closed connection to service Probeton
[2002/02/07 09:23:39, 2] smbd/close.c:close_normal_file(203)
  jh closed file Dbase/dbase.exe (numopen=16)
[2002/02/07 09:23:39, 2] smbd/close.c:close_normal_file(203)
  jh closed file Dbase/CL2.NDX (numopen=15)
[2002/02/07 09:23:39, 2] smbd/close.c:close_normal_file(203)


[2002/02/07 18:08:26, 2] smbd/server.c:exit_server(448)
  Closing connections
[2002/02/07 18:40:03, 3] smbd/sec_ctx.c:push_sec_ctx(284)
  push_sec_ctx(0, 0) : sec_ctx_stack_ndx = 1
[2002/02/07 18:40:03, 3] smbd/sec_ctx.c:set_sec_ctx(316)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1
[2002/02/07 18:40:03, 3] smbd/sec_ctx.c:get_current_groups(167)
  get_current_groups: uid 0 is in 1 groups: 99
[2002/02/07 18:40:03, 3] smbd/sec_ctx.c:pop_sec_ctx(423)
  pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0
[2002/02/07 18:40:03, 3] s couldn't find service 
jhmbd/sec_ctx.c:get_current_groups(167)
  get_current_groups: uid 0 is in 1 groups: 99
[2002/02/07 18:40:03, 3] smbd/password.c:register_vuid(322)
  uid 99 registered to name nobody
[2002/02/07 18:40:03, 3] smbd/password.c:register_vuid(324)
  Clearing default real name
[2002/02/07 18:40:03, 3] smbd/password.c:register_vuid(326)
  User name: nobody     Real name: Nobody
[2002/02/07 18:40:03, 3] smbd/process.c:chain_reply(982)
  Chained message


Here there is someone logging in as nobody????
Also something strange with oplock break????? Could this be it?

Could someone explain me why samba is searching for service jh???
There is only a netlogon and 2 paths to other directories as services.


Thanks.