I'm trying to create a gallery using movieclips. Help!

I have created a menu which contains the button [GALLERY]. When a user clicks this button it plays a movie. The movie is a set of thumbnails. heres the code I’m using to play the movie:

on (press) {
this.attachMovie(“thumbs”, “window”, 0);
window._x = -900;
window._y = 575;

When a thumbnail is clicked I want the photo to popup. The photo is also a movieclip itself. Using the same code as above nothing happens. I want to keep the photos as movieclips so I can have them load as needed to keep the file size down of the initial swf file. I’m using MX 2004 Pro. Any help with this would be appreciated.