So a couple of days ago Ive downloaded backtrack 4 live iso(first time user with the backtrack linux distro) I was able to run it through Sun xVM virtual box. Now BT4 is able to recognize my wireless nic card and I am able to run Airodump-Airplay and Aircrack which in turn I was able to capture beacon packets and also was able to fake authenticate with my Access Point and Replay ARP broadcast messages. So I know that my nic card is running fine. But whenever i try to access my ap through iwconfig wlan0 configuration I keep getting these error messages SET failed on device wlan0 Opertaion not Supported this is happens whenever I either commit interface changes, put my wlan0 interface in superuser mode. Can anyone help me connect to my AP through backtrack 4

- much obliged