Comment 17 for bug 643788

And @Guy: Not sure about WepCrackGui, but I have no issues with Wep crack-ng from the terminal. Are you using -w option and saving it?? Other then that not sure. Try doing it from terminal.

sudo airmon-ng start (dev) (ch)
sudo airodump-ng -c (ch) -w (psk) <mon0>
sudo aireplay-ng --fakeauth 0 -e "ESSID" -b BSSID -h STATION <mon0>
sudo aireplay-ng --arpreplay -b BSSID -h STATION <mon0>

try using that and see if you can get your IVs. And to anyone can they confirm if WPA is messed up or not?? I'm testing but my router is two channels N+G so not sure if I can even do WPA with a G card. Laterz