I am testing LiveCD BackTrack 4 Beta on a VAIO VGN-SR19VN using an Intel Wireless Link 5100 card.
As I've read in previous posts, this card works perfectly in BT4. In fact, I can perform net scanning and IVs capture. But the problem arises when I try to perform packet injection. I manage to send the authentication query and it says that there is authentication success, but it won't connect to the AP to start injection. I am trying it with my own AP, which uses WEP codification.
Therefore, the problem can't be related to proximity, since I perform the attack next to the router. Besides, my AP does not use MAC filtering and it is not protected again WEP attacks, because once I managed to crack my net using Troppix distribution.
I hope someone can help me with this problem. Thanks.

John Bell