When I run "findsmb" it shows every machine on the network that responds to a request for their IP and NetBIOS name. Nice for seeing who is on a network or not while out and about, or to troubleshoot. But recently, I discovered a problem. A Windows computer running XP doesn't respond to my request. This is a very handy feature that can be called "poor-mans network mapping" except that my map has a hole in it. Any ideas?