So I have cable that is hooked up to my vizio vp422 flat screen, which works fine, but now I would like to hook up a dvd player (magnavox dp100mwb) to it, which is compatible with the component cables (green, blue, and red). I hook up the connection between the tv and dvd using those green, blue, and red cables, and I have picture, but what I don't have is sound. I am confused on how to get audio...please help!!!

In reponse to electro man 101, I have rca cables both ending with red and white cables. I have one set attached to dvd player and one end attached in the back of the tv where the component cables are attached. If I took out those red and white from the dvd player, and hook them to the cable box, I would get sound from the tv, but not from the movie that is showing...the funny thing is I had this problem before and fumbled around and got sound, just dont remember how!