Using Tween class

1

I received help earlier on getting the tween class syntax.
I have one issue. Please see sample:
http://www.sergemedia.net/ds2/map/lissarazoomfix.html

Click on Lot 41 first when it loads.
You will see the map snap to another position and tween from there, rather than its current location. If I move the zoom slider manually to 200% first then it tweens correctly. I was looking for a fix. Thank you.
This only happens on the initial click of first lot (Lot 41 and 48 are coded) After that it tweens properly.


_root.map_mc.map_gra.lot41_btn.onRelease = function(){
	
    stopAllMCs();
	hideAllslides();
	_root.slide41_mc._visible=true
	_root.range41._visible=true;
    _root.map_mc.map_gra.lot41_btn.play();
	
_root.srchMC._visible=false;
	_root.info_mc._visible=true;
	_root.info_mc.gotoAndStop(41);
if (this.pressed) {


[COLOR="Red"]import mx.transitions.Tween;
import mx.transitions.easing.*;
var xmove41:Tween = new Tween(_root.map_mc, "_x", Regular.easeOut, _root.map_mc._x, (1250 - _root.map_mc.map_gra.lot41_btn._x), 2, true);
var Ymove41:Tween = new Tween(_root.map_mc, "_y", Regular.easeOut, _root.map_mc._y, (400 - _root.map_mc.map_gra.lot41_btn._y), 2, true);

} else {

var xmove41:Tween = new Tween(_root.map_mc, "_x", Regular.easeOut, _root.map_mc._x, (1250 - _root.map_mc.map_gra.lot41_btn._x), 2, true);
var Ymove41:Tween = new Tween(_root.map_mc, "_y", Regular.easeOut, _root.map_mc._y, (400 - _root.map_mc.map_gra.lot41_btn._y), 2, true);

}[/COLOR]
_root.map_mc._xscale=100;
_root.map_mc._yscale=100;
this.pressed = !this.pressed;

};