Ok, I have some problems with connecting to a WPA2 TKIP+AES secured network.
I tried the tutorial in the tutorial forum (third page, last thread)
But its already going wrong from the beginning.

Problem 1: There was no wpa_supplicant.conf file in the /etc folder.
My solution: I created a new textfile with the 'wpa_supplicant.conf' name en copied the blue lines from the tutorial in the file.

Problem 2: When I try the command given in the turtorial it wont work.
Code:
bt~#chmod 755/etc/wpa/supplicant.conf
chmod: missing operand after `755/etc/wpa/supplicant.conf'
Try `chmod --help' for more information.
At the moment I'm running BT2 in a virtual machine but I had the same problem when I booted BT2 from my usb drive.