Knoppix 7.2 connects to internet with live CD but not USB boot

[Werner P. Schulz]

Knoppix uses the NetworkManager. You can get access to it with right-mouseclick on the icon in the right side of the panel nearby the clock. Try "Edit connections" and check all the values; perhaps you'll find the error.

Otherwise start PCManFM (in the left side of the panel) => Menu "Tools" => "Open current folder as root"
Within the new window of PCManFM go to '/etc/NetworkManager/system-connections' and tell us the name and content of the file you'll find there.

[jakerr]

I looked at the Network Manager, Edit Connections and checked the values. Everything looks fine, but I'm not sure if I know what I'm looking for.
The file in /etc/NetworkManager/system-connections is called vango and the content is

[connection]
id=vango
uuid=556af77b-ac3d-4902-a323-3eda3f753575
type=802-11-wireless
timestamp=1400445262

[802-11-wireless]
ssid=vango
mode=infrastructure
bssid=00:1E:4A:E4:0A:E0
mac-address=9C:B7:0D:C6:B9:EC
seen-bssids=00:1E:4A:E4:0F:60;00:1E:4A:E4:0A:E0;
security=802-11-wireless-security

[802-11-wireless-security]
key-mgmt=wpa-psk
psk=[removed password]

[ipv4]
method=auto

[ipv6]
method=auto

Does this help diagnose the problem? I'm not sure what to look at to find the problem.