[ubuntu] intel 4965agn & aircrack-ng not working?

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http://ubuntuforums.org – Hey guys, I tried getting aircrack-ng installed on my Dell mini 9 with 9.04 installed and its been working, except I cant seem to get my AP cracked. I know this isnt a "help me be l33t and crack wifi" thread, I am just curious if I am doing something wrong. I followed this guide >>> http://ubuntuforums.org/showthread.php?t=514723 and it worked until the airodump part. I dont have anything as far as "ath0" that shows up (checked ifconfig -a). Sorry If I am a bit of a noob, I am starting to come back to linux :p help is appreciated, thanks (Hardware)