Stomping

(I don't know the words for this technique)

My stomping doesn't seem right.

When I stomp and the floor does make a big sound, then my heal hurts.

But, when I try to do the proper stomping, the floor does not make the big sound.

I know that I should jump toward the opponent as if I'm gonna step on his toe.
That should give my body's weight shift and should give the natural stomping.

But, for some reason it's not happening. I should work on this.