You can install ndiswrapper or check if it is installed through your package manager. Did you install the sources for the packages from http://easyurpmi.zarb.org/
? If not do that. This way you will also be able to update packages and install plf stuff.
So after sources are installed. Goto package manager (mcc) and search for ndiswrapper (if it has a green check in front of it, it is installed) so thats good. otherwise install it.
Now you need the 64-bit driver (this is important!) for your USB device since you are running 64bit. Check the readme of ndiswrapper to install, i think you'll have to modprobe ndiswrapper to load it in the kernel then with the userland tool "ndiswrapper" install the 64bit driver. (ndiswrapper -i /lib64/windows/mydriver.inf)
If this does not work, post the output in /var/log/messages. Its always good to keep this log at close view, you can keep this open with "tail -f /var/log/messages) also dmesg will show you the latest kernel messages.
If that does not work, you can dowload the latest ndiswrapper release and extract it to /usr/src and compile and install it, but first try that