This may be a dumb question, but I dont know what I am doing wrong.

I have 2 pcs networked via crossover cable. I can type in the computer name of each other or the IP address (both via Start->Run), but if I click the NN I can only see the PC I am currently using, not the one i want to get to. Is there something I am doing wrong? Am I trying the impossible - I have tried almost everything.

Thanks in advance...