Established the connection I needed - thanks to your help. Did have trouble with Zonealarm on the XP Machine - it reported that someone was trying to access the machine and was preventing it from doing so. Clicked on trace and it 'found' someone in the Darwin area of Australia! Then went on to try selling me the Pro version - no way, Jose! Uninstalled Zonealarm and installed Commodo instead - voila! It was the Vista machine that had caused the kerfuffle with Zonealarm. Darwin? I don't think so.