First is to figure out what the exact model type is.
/sbin/lspci
If its a Broadcom card, there' no hope except the linuxant driver you're using or the ndiswrapper:
http://ndiswrapper.sourceforge.net
It works in a smiliar way to the linuxant driver, wraping for the windows driver.
If its not broadcom, post back with what it is...
Cheers,
Finegan