ipw2200 promiscuous mode slack 11

hi,
i have an intel pro/wireless 2200BG card that uses the ipw2200 driver.
im trying to sniff in promiscuous mode but it fails, the version of the ipw2200 driver is git-1.1.1 along with it corresponding firmware v3.0. did anyone managed to get it to sniff in promisc. by some way?
i use the kernel 2.6.17.13 module that comes with slackware, maybe i should upgrade it or something?
cuz it doesnt make sense having a laptop and unable to wardrive :D

thank you