Airport Card On Silverbullet


I recently bought an airport card (the old version) for a silverbullet G4 machine. I installed it and everything seems fine in the taskbar BUT the problem is it's not picking up any signals and I have an airport base station sitting rigt next to it. I guess what Im asking is how does one isntall the card properly in terms of software (which it didnt come with to begin with) and also how does one configure the settings for the card in system preferences. It seemed like an easy thing to do but so far I havent had any luck. Please help