type in "cat /proc/net/wireless" and that will tell you what the system has assigned the card. Mine is for instance assigned eth1, instead of wlan0. From there just adjust interfaces accordingly. Hope this helps. If you find it has been assigned wlan0_rename, then try blacklisting hostap or orinoco in the /etc/modprobe.d/blacklist file, until wlan0_rename is replaced with a usable tag (eth0, eth1, wifi0 or wlan0 for example).