I run wicd ok
$ gksu wicd-gtk
Has notifications support True
Connecting to daemon...
ESSID : xxx_xxxx
make sure what shows in ifconfig -a as a wireless interface is filled in in wicd preferences>wireless interface box. Then hit the refresh button. My command above
only works if the wicd gui is installed. wicd-client works also. I just used root
in case wicd does not start for you in Back Track because of permission issues.