[Samba] Acess from windows to share get closed..

[Tito]

I'm using FC8 Server with Samba 3.0.30-fc8 and have an erratic problem
assecing the share.
I have a Share that every one can acess and I use the nobody user to
acess everithing without any problem, and from time to time when  user
tries to acess a file the share gets closed, than we have to resart the
machine and it goes wel again.

the log for one user is below

why does it closes the conection? and what can be done ?

[2008/07/16 17:41:22, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/16 17:41:22, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/17 07:48:34, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 6337)
[2008/07/17 07:48:36, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 07:48:36, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 6337)
[2008/07/17 07:48:38, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 09:51:49, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/17 09:51:49, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/17 09:55:09, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 6660)
[2008/07/17 09:55:11, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 09:55:11, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 6660)
[2008/07/17 09:55:13, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 14:19:39, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/17 14:19:39, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/17 14:26:26, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 7199)
[2008/07/17 14:26:28, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 14:26:28, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 7199)
[2008/07/17 14:26:30, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/17 16:46:04, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/17 16:46:04, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/18 07:39:38, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 10523)
[2008/07/18 07:39:44, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/18 07:39:44, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 10523)
[2008/07/18 07:39:46, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/18 17:00:48, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/18 17:00:48, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/21 07:50:46, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 5759)
[2008/07/21 07:50:49, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/21 07:50:49, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 5759)
[2008/07/21 07:50:51, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/21 17:36:27, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F
[2008/07/21 17:36:27, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/22 07:56:25, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service HPArma initially as user
nobody (uid=99, gid=99) (pid 11859)
[2008/07/22 07:56:28, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/22 07:56:28, 1] smbd/service.c:make_connection_snum(1033)
  carlap (192.168.6.114) connect to service F initially as user nobody
(uid=99, gid=99) (pid 11859)
[2008/07/22 07:56:30, 0] auth/pampass.c:smb_pam_passcheck(809)
  smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User nobody !
[2008/07/22 16:54:17, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service HPArma
[2008/07/22 16:54:17, 1] smbd/service.c:close_cnum(1230)
  carlap (192.168.6.114) closed connection to service F