just to chip Pete, I too noted the IP address as unusual.
If a Router is being used, the router and associated computers must have their own IP addresses - e.g.
Router - 192.168.2.1
Computer 1 - 192.168.2.2
Computer 2 - 192.168.2.3
set permissions in the router (if required) to allow computers to talk to each other.
NORTON Internet Security
set permissions for your network to allow your computers to talk to each other
If the Norton firewall is being used, the Windows firewall should be disabled (generally this is done automatically when Norton is installed)
Running ZoneAlarm?
If using ZoneAlarm, set permissions for your network, again to allow your computers to talk to each other.
I had the same problems with WideFS but once I configured my Router, Norton and ZoneAlarm, all worked fine as it should.
It is often a simple setting (one easily missed) that causes the most upsets.
Edit: I have found, at times, that after an update for programs like ZoneAlarm, Webroots Window Washer and at times Norton, settings are mucked up and or deleted and it is necessary to re-set them all. A pain in the butt, but it does happen.