You're getting the -1 error, which means you need to patch your wifi driver. I spent many hours figuring this out.
Are you using aircrack-ng 1.1? or 1.0?
If you are using 1.1, you're going to have to downgrade to 1.0, then patch your wifi. Theres already a script for patching the -1 problem. Let me find it.
Code:
wget http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2010-10-16.tar.bz2
tar -jxf compat-wireless-2010-10-16.tar.bz2
cd compat-wireless-2010-10-16
wget http://patches.aircrack-ng.org/mac80211.compat08082009.wl_frag+ack_v1.patch
patch -p1 < mac80211.compat08082009.wl_frag+ack_v1.patch
wget http://patches.aircrack-ng.org/channel-negative-one-maxim.patch
patch ./net/wireless/chan.c channel-negative-one-maxim.patch
gedit scripts/update-initramfs
#*** FIND LINE 13: KLIB=/lib/modules/2.6.31-wl/build
#*** REPLACE WITH: KLIB=/lib/modules/$(uname -r)/build
make
sudo make install
sudo make unload
sudo modprobe <driver name>
Your driver says, unknown, you're going to have to find the chipset, and where it says <driver-name> put in the name of your chipset, it could be anything ath9k, ath5k, b43... etc.