I just got a LinkSys WirelessG USB Card installed and, of course, the LinkSys WirelessG Router. I'm using KNOPPIX 3.9 liveCD and I tried

Code:
type - su root 
then type - iwconfig ath0 key xxxxxxxxxxx 
then type - iwconfig ath0 essid "Network Name"
but I get an error about ath0 is an unknown device. What can I do about this?

Error for wireless request "Set Encode" (8B2A) :
SET failed on device ath0 ; No such device.

Error for wireless request "Set ESSID" (8B1A) :
SET failed on device ath0 ; No such device.

TIA,
AJG