I have a Dell Dimension 8300 Win XP connected by a USB cable to a Fujitsu laptop Win 2000;  I used to have no problems, but now,although I can copy files from the 8300 to the Fujitsu, when I try to do so in the opposite direction, I get the message "Cannot copy .... THe specified network is no longer available."  I have a Sygate firewall, but whether this is turned on or off makes no difference.  The XP firewall is off.

Any suggestions greatly appreciated

Jim