Remote users access the corporate network over VPN. The Client software is Netscreen remote, and at the office end there is a Juniper firewall and Speedtouch 530 ethernet router. Applications such as Lotus Notes and Windows Terminal Services function correctly over the VPN, but it is impossible to copy files. From the remote workstation a drive can be mapped (using its IP address and sharename not its Netbios name) but when this drive is accessed, it refreshes approx every two seconds. This is more noticeable if File Manager is used rather than Explorer. Invariably any attempt to copy a file fails, even tiny files of a few KB. I have already set the MTU value on the remote machines to a value which does not fragment packets, and set opportunistic locking to OFF on the server(s). If anyone has overcome this problem, I would be very much obliged if they could share their knowledge. I am getting grief from remote users, which I am passing on to the VPN supplier - and they are not best pleased. Max points available for a solution!