Dynamically loading JPEG files

I have created a project that loads thumbnail JPEGs into three of four scenes. The thumbnails are MCs that act as buttons which dynamically load text and a larger JPEG image (like a catalog would do). The first scene with thumbnails loads the larger JPEG files correctly, but the subsequent files do not. I tried using the same MC instance name and code for all three scenes.

_root.image.loadMovie(“JPEGname.jpg”);

What am I missing?

Thanks