hey there.
when i use a live BT3 cd the wlan0 works okay (intel 9345) - i just enable it:
ifconfig wlan0 up.

but when i try using this command in BT3 usb or BT4 usb it throws an error:
SIOCSIFFLAGS: No such device

when i check iwconfig it shows the device.
what is the problem here? what am i missing?

note: the live bt3 cd that works okay has the bt3 final iso, the disk on key
with bt3 has the bt3 usb iso, and the disk on key with bt4 has the beta bt4
usb iso.