Load External Movie Clip: Image does not appear where clip is

Trying to build the same thumbnail photo gallery I’ve been working on forever. I’m loading large image into movie clip, however, when the clip loads, the picture appears over to the far right and not in the place where I have place the clip on the stage. My code is for the button is :

on (release) {
if(this.mainloader == Number(this.mainloader)){
loadMovieNum(“fam01.jpg”,this.mainloader);
} else {
this.mainloader.loadMovie(“fam01.jpg”);
}
}

I know it has something to do with x and y coordinates, but I’ve tried everything I know with no luck. If it involves AS, where do I put it.
Thanks to all who reply.:}