Vista - ORANGE WIRELESS & TALK PROBLEM

I have pretty much found solutions for everything after installing RC1 with
the exception of my wireless network. I have a wireless & talk
(Orange/Wanadoo) livebox, and before the installation of RC1 this worked
fine. I have a wireless card in the main PC, which is no longer functioning.
The wireless network is found by Vista, but despite typing in the WEP key
when prompted the card does not function. I've had to make a wired connection
now, which is untidy and i'm left with a cable running accross the lounge
floor. Does anyone have any ideas to solve this? Incidently, I rang the
Orange Livebox helpline yesterday and was pretty surprised to be asked 'What
is Vista???!!' by the orange technical support rep.