Problem with Dynamic flash animation

I have to make Dynamic flash animation ,but I have a problem with adding alpha parametar.
So ,when one picture from XML document is loaded ,after some time her alpha parametar must abat and other picture should be loaded and her alpha parametar must grow up.

This is a link how that animation must look like

I’m upload my animation,so look at her and tell me what a must to add in my code .

Extract Flash_1 and Flash_2 in one Folder.