WPA2 problem

[speedator gmx de]

hi, the wireless network is found and shown via the applet. 
wpa-supplicant is installed. if i try to connect wpa2(personal) is shown 
correctly. the key is set and i enter. It tries to connect, but nothing 
happens, it tries and tries... Have got a 2200er intel-chip. Using 
Ubuntu Feisty. What do I wrong?

Thank you for help