Loading external jpg via If statement

1

I am trying to make an “If” statement for a photo gallery I am building. When you click on a thumbnail movie clip, photo1, I would like button1.jpg to load externally into a holder movie clip. This is the code I have now, which doesn’t work and I can’t figure out why. My jpg’s are saved in the same place as my file, I have checked the easy solutions with no luck. Any help would be great since I am fairly new at this, thanks!

import gs.TweenLite;
import gs.OverwriteManager
import gs.easing.*

OverwriteManager.init(OverwriteManager.AUTO);

for (var i:Number = 0; i < 19; i++)
{
	
	_root.Target["button" + i].onRelease = function()
	{
		if (!this)
		{
		   TweenLite.to(this,.5,{loadMovie: (i+".jpg", "holder")});
		}
	}
}