How do I capture my Gameplay with Total Media Extreme?!

Okay, So I recently got a Dazzle capture card but since it was given to me by my friend it didnt come with the installation disc.. Whatever, right? No biggie. So i just installed total media Extreme. Well turns out the stupid recording software DOESNT record my gameplay from my Xbox, and its only recording the sound from my microphone on the computer. Yes, all the cables are connected right... I can see my tv screen on the computer just fine, and it says its recording, but when I go to open the file, its just audio and no video... Help out a poor, non-technical girl out, will you ?

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