Well, what is odd is that as long as we are not using that one T-1 line, tehre is no communciation problem while using PCAnywhere. I believe that if there were a network card problem that we would not be able to do anything on the LAN to which we connect. We have no problem on the LAN; it's on the WAN that we have the problem, but it may be caused possibly by Windows XP, but who really knows, except for Microsoft? The mapped drive fails, disconnecting the networked path, but this doesn't happen to any other mapped drive, only on the T-1 line.