Kali linux probelms

hi guys i didnt know where to post this so post it here.
i am having some problems with Kali Linux i want to crack a wpa2 but Kali doesn't recognize my WiFi hardware i searched on the net and they say that we need a WiFi USB i have but Kali also doesn't recognize what can i do?

http://forums.kali.org/

Try asking over on that forum.