Problema con driver wireless acx e wpa_supplicant

[Paolo Gatti]

Hello I have a wireless nic Texas Instruments with chipset ACX111. 

I have used this (external) driver to use it with FreeBSD:

http://dev.kewl.org/acx100+111/

With Wep security (128 bit) it work very well, but I want use Wpa
security; when I run wpa_supplicant I have this error
(wpa_supplicant.conf is right!):

one at jupiter:~# wpa_supplicant -Dbsd -iacx0 -c/etc/wpa_supplicant.conf
ioctl[SIOCG80211, op 16]: Invalid argument
Failed to initialize driver interface

Can you help me, please?

Thank you very much.
-- 
Paolo Gatti <paolo.gatti AT gmail.com>