Conflict between location and button instances

programming flash
1

The map locationscript does not recognize the button instance name, it calls from the main timeline the instance:

//map location
  var justStarted = true;
  _root.btn1917.onRollOver = function() { 
    justStarted = false;
  				endX = 100;
  				endY = 50;
  				  xscale = 140;
  				yscale = 140;
  		 
  };
  _root.btn1932.onRollOver = function() { 
    justStarted = false;
  				endX = 50;
  				endY = 30;
  				  xscale = 100;
  				yscale = 100;
  }; 
  _root.btn1940.onRollOver = function() { 
    justStarted = false;
  				endX = 100;
  				endY = 30;
  				  xscale = 80;
  				yscale = 80;
  		 
  };
  _root.btn1945.onRollOver = function() { 
    justStarted = false;
  				endX = 110;
  				endY = 50;
  				  xscale = 100;
  				yscale = 100;;
  };  
  
  
  
  //buttons instance names
  buttons_array = ["btn1917", "btn1932", "btn1940", "btn1945"];
  
  //hitareas
  btn1917.hitArea = _root.btn1917.ha;
  btn1932.hitArea = _root.btn1932.ha;
  btn1940.hitArea = _root.btn1940.ha;
  btn1945.hitArea = _root.btn1945.ha;
  
  
  function activeButton() {
  	for (var i in buttons_array) {
  		var ref = this._parent[buttons_array*];
  		if (ref == this) {
  			holder.loadMovie(movies_array*);
  			ref.f = "active state";
  			ref.enabled = false;
  		} else {
  			ref.f = "normal state";
  			ref.enabled = true;
  		}
  		ref.gotoAndStop(ref.f);
  	}
  }
  for (var i in buttons_array) {
  	this[buttons_array*].f = "normal state";
  	this[buttons_array*].onPress = activeButton;
  	this[buttons_array*].onRollOver = function() {
  		this.gotoAndPlay("over state");
  	};
  	this[buttons_array*].onRollOut = function() {
  		this.gotoAndPlay("out state");
  	};
  }

I also tried creating a different layer with the buttons containing bigger hitareas, but it worked not good.
You’ll probably get a better picture if you see the fla file.
The fla is uploaded here: nav_map_dbug.rar

Thanks,

Baeshin.