I'm having a problem, i can't connect to wpa... Any one with this chipset can? How ?

I do:
/etc/init.d/NetworkManager start
And the globe stays green. I create a new connection with everything, and it starts trying to connect (globe disappear and appear another thing)... But it cant connect, the other thing that substitutes the globe stays there, but it stop trying to connect a (Device: wlan0 state: Disconnected).