Airport Express & Netgear Wg311t


I have a Powerbook G4 running OS X 10.4.2. I bought an airport express to link to my stereo and as airport (original version) cards are expensive, I bought a netgear WG311T and downloaded the Orangeware driver for this. The card is recognised OK in system preferences and occasionally finds a network out there but it does not seem to see the airport express and when I try to run airport express setup it just tells me I do not have an airport card. Is what I am trying to do impossible meaning I will have to buy an airport card off ebay or is there a way around this problem?