I would like to learn how to crack Wep and WPA keys. I have tried
using Cain, but could not get it to work with my wireless cards. The
options under Cain's wireless tab are grayed-out so I assume that it
would not work. The two types of cards that I have are listed below.

Type : Trendnet TEW-424UB Wireless USB Nic
Chipset: Realtek RTL8187b Wireless LAN USB Nic

Type : 2Wire 802.11g USB Wireless LAN Card

If anyone has any suggestion on how I can crack wireless WEP and WPA
keys using my current wireless cards, I would appreciate hearing it.
Thanks in advance.

Philip