for any devices to see each other on a single network they should be a member of the same workgroup name and has a unique computer name. Disabled any firewall you got on a PC also wil help and file and printer sharing of course should be enable also (which is, by default). Go to the DOS prompt (start>>>run, type cmd>>>ok) and type ipconfig on each PC for you to get the IP address. And still on the DOS prompt type ping + space bar + (ip address) and then enter. Make sure that you will get a reply on both ends. If you get a reply then it should work.