I see you commented about still not having any luck?
Is there an uninstall app? Sometimes they do not play nice if you have tried multiple installs. I had this happen with a rosewill wireless usb adapter. Once I uninstalled everything I tried before, it then worked with the newest drivers installed fresh. Try uninstalling if you can... and starting from scratch.
Hopefuly there is an uninstall to make this easy.
EDIT: Also, make sure the device is not plugged in from the start.
- Uninstall previous attempts
- Install Drivers
- Now plug in device and see what happens
Let us know if that works?
EDIT 2: Also, do you have other 3rd party wireless cards installed or have installed in the past? Out of curiosity, what type of mac are you trying to install this on?
You can check for the device existance in the system profiler under the USB bus and see if it is there. It would be under the USB category-->usb bus-->some device name. There might be many usb bus's depending if any usb cards or hubs are connected. Are you connecting this straight to the mac or through a hub possibly?
The company mentions 10.4.x and 10.5.x in the compatibility section of the manual. So they claim to support the exact configuration you are using. This might be one to call in to the company if worse comes to worst.