Try this website below it shows you how to disable the free drivers and download specific ones. Also please post your info
like i'm running
Fedora 17 Kernal 3.5 So we know what your working with and if you know the model/brand of your wireless card that would help as well. If not there is a tool to look it up.https://help.ubuntu.com/community/WifiDocs/Driver/Ndiswrapper/
Best of luck!