Possible domain related wireless problem

I have recently installed a Microsoft MN700 Hub which is Wireless G.

My Pocket PC, Main PC (XP Home) and Laptop (XP Pro) all work fine connecting
quickly, my Backup PC (Win XP Home) which uses a D-Link PCI B adapter
(DWL-520) is a different story!

When XP was first loaded on the Spare PC, everything worked fine and the
internet was accessible. Internet connectivity stopped as soon as i moved the
Spare PC in to my "Home" domain.

Before i moved domains, i updated the Spare PC with all the latest patches
from windowsupdate. I have since tried to manually assign the DNS, Gateway
and IP address, but it still does not work. I also moved the machine back to
the default domain "MSHOME" which is the one that the fresh install of XP
defines but that did not work either.

Any ideas?