Comment 4 for bug 195975

Ok, I see that you don't have a "normal" trouble ;)
Well, if your wired connection have DHCP, you must try in your terminal: sudo dhclient

If you have static address, open the network-manager and insert the IP asigned, and then restart the network (command on the previous post).
This command ask for a new IP in the wired and wireless connection, and the first to gives it, is the new network to be attached. The previous commands works on both interfaces.