Please Help!

I use Imageready. And in desperate need of some help.

Whenever I make an icon that has lots of frames in it, it starts alright at first (when i change the time of the text). But when I get to the text at the back, they slow down a lot!! When I view them, they just go slower and slower and slower. I have no idea what happened.

Here's an example of one of my icons.

You see the 'bea' comes out really quick but the ones at the back ('ful') move really slowly.

I also made another icon that had 17 frames in it. And it turned out even worse.

Please help!