I keep getting the "session is lost" errors with a certain box.

I already changed the maxsessions, maxschedule, idletimeout, but no
changes. The errors keep coming.

Only specials about this box is the fact that it has large files (oracle
database) and that it is behind a firewall. I assume
the big files (2 and 4 gb) are making the problem here.

Any hints where I can look next?

Thanks,

Geert

Server side:

10/26/04   03:15:01      ANR0480W Session 4563 for node AILDB (WinNT)
terminated -
                          connection with client severed.
10/26/04   03:26:22      ANR0480W Session 4566 for node AILDB (WinNT)
terminated -
                          connection with client severed.
10/26/04   03:45:54      ANR0480W Session 4567 for node AILDB (WinNT)
terminated -
                          connection with client severed.
10/26/04   04:15:49      ANR0480W Session 4568 for node AILDB (WinNT)
terminated -
                          connection with client severed.

Client side dsmerror.log

26-10-2004 03:17:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:17:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:17:23 ANS1810E TSM session has been reestablished.
26-10-2004 03:41:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:41:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:41:23 ANS1810E TSM session has been reestablished.
26-10-2004 04:11:03 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 04:11:03 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 04:11:18 ANS1810E TSM session has been reestablished.
26-10-2004 04:43:58 ANS1809W Session is lost; initializing session reopen
procedure.

Client side dsmsched.log

26-10-2004 03:07:58 --- SCHEDULEREC OBJECT BEGIN BACKUP_INC_AIL 26-10-2004
03:00:00
26-10-2004 03:17:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:17:23 ... successful
26-10-2004 03:41:08 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 03:41:23 ... successful
26-10-2004 04:11:03 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 04:11:18 ... successful
26-10-2004 04:43:58 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 04:44:13 ... successful
26-10-2004 05:11:36 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 05:11:51 ... successful
26-10-2004 05:17:11 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 05:17:26 ... successful
26-10-2004 05:32:41 ANS1809W Session is lost; initializing session reopen
procedure.
26-10-2004 05:32:56 ... successful
26-10-2004 05:35:47 --- SCHEDULEREC STATUS BEGIN
26-10-2004 05:35:47 Total number of objects inspected:   78,805