I have used Jasc Animation to create an animation and I want to add it (superimpose?) to live-action video that I filmed. When I try to add the dragon (animation) to the live-action (people), the background from the dragon is black, even though I used a transparent background in Jasc. How can I get rid of the black background so that the real-live people in my video are seen? I'm new at this, but trying hard!

Thanks in advance.