Ubuntu Networking :: Cannot Connect To Unencrypted Wireless Networks

I have a machine running Xubuntu [2.6.22-14-generic]. I have been trying to get this machine connected to wireless for ages, and I'm having another stab at it. So far I have install ndiswrapper and loaded the driver for a Linksys wireless adapter. The output of 'ndiswrapper -l' reports:

Code:

wusb11v4 : driver installed
devoce (13B1: 000B) present

So as far as my newbie knowledge goes, I believe that step to be completed, correct?When I turn on the machine is type in

Code:

sudo sh
modprobe ndiswrapper

to get the card running to where it will appear in the iwconfig dialog.The commands 'iwlist wlan0 scan' will list all the wireless networks around me, but I have been un-able to connect to any network, even unencrypted ones. I have tried to connect both through Wicd and command-line to no avail. For command-line I have used:

Code:

sudo ifconfig wlan0 down
sudo dhclient -r wlan0
sudo ifconfig wlan0 up

[code]....

With the final 'dhclient wlan0' commands, the following is returned:

Code:

There is already a pid file /var/run/dhclient.pid with pid 134519120
Internet Systems Consortium DHCP Client V3.0.5
Copyright 2004-2006 Internet Systems Consortium

[code].....

I have attempted to go ahead a step further and connect to an encrypted wireless network, however, I receive the same message, as well as another error message upon trying to enter the key, with the following code:

Code:

iwconfig wlan0 key s:"thekey"

Error for wireless request "Set Encode" (8B2A) : SET failed on device wlan0 ; Invalid argument.