Oi, there is so much that could be going on here...
Its an
Atheros AR6003G chip, which as far as i know, supports 802.11 A/B/G/N, and hardware encryption for WEP/WPA...
Odds are, if its an 802.1x type network, the chip will do the encrypting/decrypting after the handshake is completed, provided its set up correctly. WEP and WPA are set up by using a Pre-shared Key that all users need to have... If you study how to recover the key, you'll find that the hash is created by taking the plaintext passkey, running it through the specified algorithm, then salting it with the name of the network. So long as all devices have the correct network name and the correct plaintext password, any device can connect to the network, because they'll all end up with the same hash.
802.1x encryption is different. It uses an authentication server. This makes it similar to any modern computer you log onto. You provide the computer with your credentials, and it checks it against the server. If they match, then you are allowed access. If they don't you get an error message. Which means, that if anything is broken, it won't work. If you don't use the correct authentication protocol, it won't work. If you don't have the right certificates, it won't work.
Best advice I can give is, double check everything. Make sure your Gio has the correct certificates and that its using the correct protocols. Double check your IP/Subnet Mask/Gateway addresses. If you don't have an IP address, you'll have to manually configure it. If the Subnet Mask is incorrect or the Gateway address is incorrect, it won't work either. Also, check your DNS server addresses. If those aren't correct it won't load any webpages using URLs. It will only load them using the IP address of the server. Which means, telling the browser to go to
www.google.com won't work, but if you tell it to go to 173.194.67.99:80, it will load the Google homepage.
Hopefully this will give you somewhere to start...