AS2 movie clip replaced

I am creating a website which loads movie clips in to a generic interface depending on which page is selected. As there is a very slight delay between the clips being loaded, this causes the white background to flash between clips being loaded. I’ve therefore created a movie clip on the stage which changes colour depending on the colour that is about to be loaded, therefore negating this issue. However, the dynamic movie clip which loads the pages seems to be replacing my background movie clip causing the same background issue to occur. I think it might be a layers issue, but I’m not sure how to declare this. Any help welcome.