I just went to Radio Shack and I bought a 12 foot S-Video A/V Dubbing Cable. Then I bought a regular 12 foot S-video cable and a connector to connect the 2 together (since my TV is about 20 feet away) I hooked the S-Video cable and the Red and White cables into the back of my TV under "Video 3". I then hooked the other end of the S-Video cable to the back of my Radeon 8500. I turned the TV on and went to video 3 and got a blank screen. I know I am doing something wrong, just have no idea what, can someone please help me?