Frst off, add your new account to the sudoers group:
A. Open a Root Terminal and type visudo (to access and edit the list)
B. Using the up/down arrows, navigate to the bottom of the sudoers file that is now displayed in the terminal
C. Just under the line that looks like the following:
D. Add the following (replacing user with your actual username):root ALL=(ALL) ALL
E. Now press Ctrl+X and press Y when promted to saveuser ALL=(ALL) ALL
Now Open up a new shell and type;
Enter YOUR password.sudo start-network
This will list all you active network connections.
Look for the line;
It should be populated with an IP address (should start off with 192 if your connected to a router or if your on a LAN)inet addr:***.***.***.***
Try a simple Ping to Google. You should get some response and you will be able to browse the Internet.