i'm trying to test (understand risk-faktor) wifitap.
I've set up a mini wep wlan. One card is connected while other card (atheros) tries to "wifitap".

Each time i run wifitap ( wifitap -b xxxx -w key ) i get an error :
No such file or directory /dev/net/tun
Wifitap tries correct card (ath0).
For additional info : I'm using a pcmcia card

I can't find related info in forum.
Does anyone have a hint how to fix this or how to use wifitap correct ?