Loading multiple movieclips

Hey!

I’m working with four movie clips- I have each movie clip load an external image and then fade in. These images have to remain on the screen once they are faded in - not replace each other.

So I have dragged 4 movie clips into their position on the stage, and gave them a name: m1, m2, m3, m4. Each movie clip is on their own layer in the timeline because they will display on the screen at different times. On each layer I have placed this corresponding code:

m1.loadMovie("_load/img1.jpg");
m1._alpha=0;
this.onEnterFrame=function(){
if(m1._width>0){
m1._alpha+=20;
}
}

… and so on for each movie clip.

When I test it, each image fades in as it should - BUT - the only image that fades in 100% is the one that fades in last on the timeline. The other three fade in to about 80% and stay like that.

How do I fix this??

Thanks!