In case you made a type O. Like below on getting the Wifi to work and the maybe
the version. I would go for the upgrade for a easy out and see if it it goes. If
not, you'll need to go this route.
https://help.ubuntu.com/community/WifiDocs/Device/Airlink101_AWLL3026
USB WIFI cards are not costly.
Here is a link to help you find one.
https://help.ubuntu.com/community/WifiDocs/WirelessCardsSupported?highlight=%28w\
ifi%29