samba - Nov 2003 - netbios-ssn problem

Hi

I'm looking for help in netbios-ssn problem we ecountered.

Our server is HP UNIX 10.20, and samba is 2.0.7.

recently, we can saw error message in syslog.log file:
"netbios-ssn/tcp: accept: Resource temporarily unavailable"
and, from log.smb, we can see beblow message:
  Failed to set socket option TCP_NODELAY (Error Invalid argument)
[2003/11/08 03:56:54, 0] lib/util_sock.c:(1045)
  getpeername failed. Error was Invalid argument
[2003/11/08 03:56:55, 0] lib/util_sock.c:(540)
[2003/11/08 03:56:58, 0] lib/util_sock.c:(1045)
  getpeername failed. Error was Invalid argument
[2003/11/08 03:56:58, 0] lib/util_sock.c:(540)
  write_socket_data: write failure. Error = Broken pipe
[2003/11/08 03:56:58, 0] lib/util_sock.c:(565)
  write_socket: Error writing 4 bytes to socket 4: ERRNO = Broken pipe
[2003/11/08 03:56:58, 0] lib/util_sock.c:(754)
  Error writing 4 bytes to client. -1. Exiting
  write_socket_data: write failure. Error = Broken pipe
[2003/11/08 03:56:58, 0] lib/util_sock.c:(565)
  write_socket: Error writing 4 bytes to socket 4: ERRNO = Broken pipe
[2003/11/08 03:56:58, 0] lib/util_sock.c:(754)
  Error writing 4 bytes to client. -1. Exiting
[2003/11/08 03:57:11, 1] smbd/server.c:(641)
  smbd version 2.0.7 started.
....

Can anybody give the advise about what should be the reason about above
error? and how to solve it.

Thanks