I'm trying to make an animated gif with a transparent background, but I'm having a strange problem.
I'm using this as the original:(this is only the first 10 frames and drastically slowed down)

But when I delete the background, the animation turns out like this:

Anybody know why the frames are repeating in the background?
I'm using Ulead gif animator, if anyone has used it.
And sorry if this is should have gone in creativity. I wasn't sure.