HI, just finished building a PC and everything is fine except when i plug my speakers into the back of my computer they do not work. However, when plugged into the back of the monitor, the speakers work. I am running windows 7 and using Google Chrome. In addition, when the jack is plugged into the back of the system, the test sounds work in realtek audio manager, but i cant get audio anywhere else, not even on the windows test sounds. Help is much appreciated