You need to download and install the ndiswrapper package for that card to work.
Ndiswrapper can be downloaded from http://sourceforge.net/
just enter "ndiswrapper" in the search bar on the left. It will take you to the project page, from which you can download.
After downloading, follow the installation instructions at this site: http://ndiswrapper.sourceforge.net/m...p/Installation
You also want to check what version of that card you have. There are Ver 1, 2 and 4. I have a Ver 1, which is from July 2004. Check the linksys site for more details on the versions.
Hope this helps!