so i have at&t yahoo high sped internet and whenever im playing cod 5 waw my internet goes off and says an ethernet cable is not connected i have a black cable that goes at the back of my pos3 and that goes into the router and i have a yellow one for the computer and my router has a lot of inputs for ethernet cables am i only suppose to connect the black one or the yellow one or both im tired of playing and my internet goes off while im playing PLEASE HELP