First follow the instructions to configure kismet form the website bellow
http://irongeek.com/i.php?submenu=za...wardrivingapps
I had trouble because I needed to tell the card to go into monitor mode you can do it by issuing the following command in the terminal
kismet_monitor
to remove it from monitor
kismet_unmonitor
the card has to be on in order to put it in monitor so I eventually wrote 2 scripts cardon.sh and cardoff.sh and put them in /home/root/usr/bin/
the first turns on the card then puts it into the first configuration in networking then into monitor mode
#!/bin/sh
/sbin/cardctl scheme CardResume
/sbin/cardctl scheme qpewlan1
kismet_monitor
the second takes it out of mointor and the shuts off the card
#!/bin/sh
kismet_ummonitor
/sbin/cardctl scheme CardSuspend
Don't forget to make them executable if you decide to use the scripts I would first try turning the car on in the usual way then typing kismet_monitor in terminal and see if that helps. I don't remember if you have to start kismet befor kismet Qt or not been a long time since I used kismet Qt.