How to hook my rca cable properly?

So I bought a VGA cable and a RCA jack to hook my laptop to my computer, so that I could watch hulu on the big screen. The only problem is that while I can get the picture to show up no problem, the RCA does not seem to want to corporate. I have a 3.5 mm RCA cable that runs from the mic slot on my alienware laptop... show more So I bought a VGA cable and a RCA jack to hook my laptop to my computer, so that I could watch hulu on the big screen. The only problem is that while I can get the picture to show up no problem, the RCA does not seem to want to corporate. I have a 3.5 mm RCA cable that runs from the mic slot on my alienware laptop (windows 7 if that helps) to the red and white cables on my Samsung HDTV, but there is still no sound when I do anything on it.
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