Cant connect to xbox via ethernet anymore

A week ago I could connect to Xbox Live through an ethernet cable connected to my laptop. The first time, I went to my network connections and I had Local Network and Wireless. What i did is that I right clicked the wireless connection and went to sharing and checked the two boxes displayed. After that, I bridged the local network and the wireless connection and that way I connected to Xbox Live.

The problem began when I disconnected the ethernet cable and tried to
to connect it again. Now when I go to my Network Connectios the only two connections I see is Ethernet and in small letters theres Realtek PCIe FE Family Controller and the other one is my normal wi-fi. When I right click the wi-fi and select sharing and check the first box, I can no longer bridge the Ethernet with wi-fi and a message appears saying: To create a Network Bridge you must select at least two Lan networks.

FYI I'm using a Dell Inspiron 15 windows 8