[Molecula]

onLoadComplete

попробуйте

fmc = createEmptyMovieClip("footer_cell", this.getNextHighestDepth())    	
      fmcl = new MovieClipLoader();
      fmcl.onLoadComplete = function(fmc){
doSomeThing()
		  }
      fmcl.addListener(fmcl);
      fmcl.loadClip("images/footer/"+_img,fmc);
 }