I got Fallout 3 Game of the Year Edition, and when I installed the dlc then went back to my Fallout 3 disk, it shows that the dlc is present, but it will not allow me to click on it and start a new game for the downloadable content. I've installed it twice, and it still won't let me play any of the five games. I need suggestions on how to fix the problem and play the dlc.