hancock jump effect

Tried hancock jumpt effect using kdenlive 0.8.2 on ubuntu 10.10
When I used movie with black background, it can be composite easily.
There's problem when I tried to overlay and compositing picture....
I don't know how to do it.

This is what I did on video

Is there something that I miss ?
Please help me how to do it just like overlay and composite on after effect

Kdenlive is my favourite.
Thank you very much.