I don't know which driver you tried to install into ndiswrapper but you ought to checkout
http://ndiswrapper.sourceforge.net/wiki/index.php/List
Card: Linksys WPC11 v4
Chipset: Realtek RTL8180L
pciid: 1186:3300
Driver: Don't use driver that ships with card. Use driver for RTL8180L from http://www.realtek.com.tw/downloads/...x?Keyword=8180
Other: See D-Link DWL-510 (the pci-id part). Works fine with 2.6 kernel and ndiswrapper 0.8.
You might also want to look at
http://ndiswrapper.sourceforge.net/wiki/index.php/FAQ
I had to try several different .inf files before finding one that worked with my broadcom.
I'd try the one off ndiswrapper's page(above) first.
If it still doesn't work,copy the driver folder to /home/knoppix
Open a terminal
su <enter>
ndiswrapper -i driverfolder/your.inf
This will manually install the driver.
Good Luck