Is it possible to crack wireless networks with the Intel® PRO/Wireless 3945ABG?

using backtrack2 i cant seem to run kismet...

FATAL: No packsources were enabled.

also, when i use iwconfig i get...

unassociated ESSID: off/any


i am a complete noob at this sort of stuff so speak slowly and clearly.

cheers.

MOD EDIT: Search the forum and wiki for your chipset/wireless card, the forum for kismet and you will get your answer. Remember the rules, Search before asking a question.