Try installing one of the graphical front ends to ndiswrapper so you don't need to use the command line as much. Either find the package ndisgtk using the Synaptic Package Manager and install it from there or type the following command in a terminal:
sudo apt-get install ndisgtk
Then proceed to opening it, probably from the System > Administration menu, click Install New Driver, and select the windows driver for your card. That might solve your problem.