I have setup remote Desktop Web Connection on my Desktop which has Windows XP
Pro SP2. I have a laptop which has Windows XP Home Edition.I manage to setup
network between Desktop and laptop wire wireless router. And I am able to
connect my Desktop via RDWC. When I move my laptop to different ISP and
connect via RDWB, it does not work.

RDWC only works on same ISP, I think. Can anyone help me? What setup do I
need in order to connect my desktop with different ISP?