1. emove ndiswrapper

sudo ndiswrapper -e net5211
sudo modprobe -r ndiswrapper
sudo apt-get remove --purge ndiswrapper-common ndiswrapper-utils ndisgtk

2. build, instakk and load madwifi with new HAL

svn co http://svn.madwifi.org/madwifi/trunk madwifi
wget httpp://people.freebsd.org/~sam/ath_hal-20080528.tgz
cd madwifi
mv hal hal.old
tar xvf ../ath_hal-20080528.tgz
mv ath_hal-20080528 hal
sudo make install BINDIR=/usr/bin MANDIR=/usr/share/man
sudo depmod -ae
sudo modprobe ath_pci
echo ath_hal | sudo tee -a /etc/modules
echo ath_pci | sudo tee -a /etc/modules