ImageReady GIF Problems

I've been experiementing with animated GIFs and I've encountered some problems. I've been importing video frames and putting them in a series to create a short animation. When I export it as a GIF, it runs smoothly on Firefox, but it runs horribly in IE. I've seen some other "video GIFs" and they run smoothly in both explorers. Does anyone know what I'm doing wrong?

Thanks for the help