GLatLngBounds が上手く動作しないのですが、分かる方いらっしゃいませんか

var map = new GMap2(document.getElementById("map"));
var geocoder = new GClientGeocoder();
var one;
var two;

geocoder.getLocations( "港区赤坂5-3-6", function(locations) {
  if (!locations || locations.Status.code != 200) {
    alert(address + " not found");
  } else {
    var place = locations.Placemark[0];
    var point = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
    one = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
    map.setCenter(point, 16);
    var marker = new GMarker(point);
    map.addOverlay(marker);
  }
} );
geocoder.getLocations( "港区東新橋1-6-1", function(locations) {
  if (!locations || locations.Status.code != 200) {
    alert(address + " not found");
  } else {
    var place = locations.Placemark[0];
    var point = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
    two = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
    var marker = new GMarker(point);
    map.addOverlay(marker);
  }
} );
var gb = new GLatLngBounds( one, two );
map.setCenter( gb.getCenter(), map.getBoundsZoomLevel( gb ) );