Backtrack 3 is awesome,
The remote expliot forums are filled with answers to your questions.
probally the best way to learn is to use the shell to issue the commands
Need more information on your wireless card although you should see sent data packets and the client transfers data from the access point.
If your card is atheros based try the following
airmon-ng start wifi0 0
it will crate a virtual card called ath1 and puts it into moniter mode ( you can check by typing iwconfig for a list of adapters)
then type
airodump-ng ath1 -w log --ivs --channel (whatever channel number the ap is on)
A small arp poison and and you be cracking wep with in 10 minutes.
Then look at a program called ettercap. run this by typing ettercap -C in a new shell
Good Luck
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