If you have problems with connectivity check the properties of the network card. XP has a built in firewall. With the upcoming service pack 2 it gets turned on by default. I turned off the firewall and then it worked fine. right click on network neighborhood, if the firewall is on it will say firewall enabled on the local are connection icon. Right click on local area connection, choose properties, and go to advanced, uncheck protect my computer under the internet connectionn firewall.

In service pack 2 it is in a different place it is in the security center.