Windows users losing connections

I have a Xserve running Server 10.4.6 - The machine is running DNS, is an OD master and a Standalone Windows server (WorkGroup master) We are sharing one directory via SMB to approx 50 windows users in an existing windows network The windows users are losing connections or cannot connect I am having problems with the windows services stopping with Got SIGTERM: going down... (in log.nmbd) and in log.smbd [2006/08/23 10:47:31, 0] /SourceCache/samba/samba-92.19/samba/source/smbd/service.c:make_connection_snum(620) '/tmp' does not exist or is not a directory, when connecting to [IPC$] [2006/08/23 10:49:32, 0] /SourceCache/samba/samba-92.19/samba/source/lib/util_sock.c:get_peer_addr(1016) getpeername failed. Error was Socket is not connected [2006/08/23 10:49:32, 0] /SourceCache/samba/samba-92.19/samba/source/lib/util_sock.c:get_peer_addr(1016) getpeername failed. Error was Socket is not connected [2006/08/23 10:49:32, 0] /SourceCache/samba/samba-92.19/samba/source/lib/util_sock.c:write_socket_data(446) write_socket_data: write failure. Error = Broken pipe [2006/08/23 10:49:32, 0] /SourceCache/samba/samba-92.19/samba/source/lib/util_sock.c:write_socket(471) write_socket: Error writing 4 bytes to socket 23: ERRNO = Broken pipe [2006/08/23 10:49:32, 0] /SourceCache/samba/samba-92.19/samba/source/lib/util_sock.c:send_smb(663) Error writing 4 bytes to client. -1. (Broken pipe) Does anyone have any pointers or fixes as this is now becoming tiresome Tony