Broken pipe

[Bauhaus]

Hi everybody,
I've set up a Samba server. It works as a backup server for win98 and NT
4.0 Workstation.
I can copy files from Win to Samba. But sometimes I can not copy them
back.
It concerns mainly bigger files (aprox. 50 MB or more). In the log file
I find:

[2000/11/20 10:40:13, 1] smbd/service.c:make_connection(550)
  ballantines (192.168.1.2) connect to service Exchange as user
ballantines (uid=502, gid=500) (pid 22742)
[2000/11/20 12:50:45, 0] lib/util_sock.c:write_data(508)
  write_data: write failure. Error = Broken pipe
[2000/11/20 12:50:45, 0] lib/util_sock.c:read_socket_data(477)
  read_socket_data: recv failure for 4. Error = Connection reset by peer
[2000/11/20 12:50:45, 1] smbd/service.c:close_cnum(583)
  ballantines (192.168.1.2) closed connection to service Exchange

What's going on? I have no idea. What do these errors mean at all?

Thx for any answer

Przemek