How to configure BL-LW05-5R USB wi-fi adaptor?

Hi,

I just bought a LB-Link LB-LW05-5R2 wireless usb adaptor to replace my poor airport signal on my 1.67ghz Powerbook G4.

I have downbloaded and installed the driver but now i'm stuck! I get a wireless utility opening and a message saying "plese enable WLAN crd in the neetwork item of system preferences". It's the correct driver for OS X 10.5 but i can't see how to add it or configure it?

Any help would be great!

thanks.

link to website:

http://www.lefen.com/index.php/Product/views/id/91