[backtrack5] Get your wireless up and running using wicd

(1) Go: Internet -> Wicd Network Manager.
    If error: Could not connect to wicd's D-Bus...Go to (2)
    If wicd cannot recognize your wireless card (eg.cannot find any wireless AP in range (if have)). Go to (3)
    If you try to connect to an AP using WEP and receive "Bad password", check if you enter in passphrase mode or hex mode
    If you try to connect to an AP and receive "Unable To Get IP Address" or "Connection failed: Could not contact the wireless access point" or ...Go to (4)

(2) Take a look at Basic Usage#WICD NetworkManager, notice that you HAVE TO reboot backtrack, and run 2 commands BEFORE starting wicd, if not, it won't work.

(3) Follow the instruction to install wireless driver Wireless Drivers. If your card not in the list, be nice and report it :p

(4) Try one of these until it works
sudo rm /etc/udev/rules.d/70-persistent-net.rules
apt-get install dhcp-client
read line by line from dmesg, notice the dhcp lines to find the problems.

EDIT: 
modprobe -r <driver>
modprobe -s <driver>
restart wicd


Ref:
http://www.backtrack-linux.org/wiki/index.php/Basic_Usage#WICD_Network_Manager
http://www.backtrack-linux.org/wiki/index.php/Wireless_Drivers
http://www.fir3net.com/Debian-/-Ubuntu/configuring-a-wireless-connection-within-backtrack-4-r2.html