Wireless Network

I don't even klnow if I will be able to explain this problem correctly, but
here goes...

I have 2 desktop PC's and a laptop at home, which are all on the one
network. My PC (Windows Vista Home Premium) and the laptop (Windows Vista
Home Premium) both connect to the network wirelessly but the other PC
(Windows XP Home Edition) needs an ethernet cable. The other PC (Windows XP
Home Edition) that needs the ethernet cable cannot connect wirelessly so I
bought a Belkin Wireless G USB Network Adapter and installed the software and
drivers for it. When I follow the commands here -
http://windowshelp.microsoft.com/Win...7e35f1033.mspx
- To manually add a wireless computer running Windows XP - I can only get as
far as Stage 5. When I go to complete Stage 6 I come on a problem, it asks me
to click the wireless network connection icon... there isn't one. I thought
the Belkin Wireless G USB Network Adapter would allow the other PC (Windows
XP Home Edition) to connect to the network wirelessly?

I was told to come here by the Vista Support Forum.

Any help will be much appreciated.

Cheers, Matt.