Today when open my Backtrack4R2, there's some error "SIOCSIFFLAGS: Unknown error 132" when I'm running ifconfig wlan0 up. I don't know actually what happen with my Backtrack machine, because the day before, everything is running well.
v4L@bt:~# ifconfig wlan0 up SIOCSIFFLAGS: Unknown error 132
After Googling, finally I found how to resolve the error above.
rmmod ath5k rfkill block all rfkill unblock all modprobe ath5k rfkill unblock all ifconfig wlan0 up
Hope this can help you who have the same problem with me…:-)