Can't set up dazzle hd plus video creator?

Hey guys I just got a dazzle yesterday and I've been trying all day for it to work. I have double ended red,white, and yellow cables that plug into the dazzle and into the back of my HD tv. I also installed the Studio 14 software. After I plugged that in, It says " no input signal found." then I got a double headed s video chord and plugged it in as well. Still no signal! I'm so frustrated that it came with crappy directions, someone plz help before I return this!