Cant bridge two connections

Im using a Dell Inspiron 15 with windows 8 and i´m having trouble bridging two connections.

A week ago I wento to my Network Connections and there appeared two connections. One was for Local Network and the other for Wireless Connection. I had to right click the Wirelless tab and clicked on the sharing option. I checked the first box because I wanted to connect my laptop to the Xbox using an ethernet cable. After checking the box I successfully bridged the two connections.

The problem started when I unplugged the ethernet cable for the first time. When I tried to do the exact same steps above and checking the box in the sharing section, I got a message saying that to Make a Bridge Connection I have to select two Lan connections.  

I dont know what the problem is. Oh and another thing is that Instead of saying Local Connection it now says Ethernet and in small letters Realtek PCIe FE Family Controller.