谷歌map删除自定义控件的问题

initialize: function() {
        lat = 83.14746;
        lng = 93.34175376;

        var myLatLng = new google.maps.LatLng(lat, lng);

        var myOptions = {
            zoom: 4,
            center: new google.maps.LatLng(-33, 151),
            mapTypeControl: true,
            mapTypeControlOptions: {
                style: google.maps.MapTypeControlStyle.DROPDOWN_MENU
            },
            disableDefaultUI: true,
            panControl: false,
            zoomControl: false,
            scaleControl: true,
            zoomControl: true,
            zoomControlOptions: {
                style: google.maps.ZoomControlStyle.SMALL
            },
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        var map = new GMap2(document.getElementById("map_canvas"), myOptions);
        map.setCenter(new GLatLng(39.9493, 116.3975), 13);
        map.RemoveControl("GMapTypeControl");
}

myOptions参数好像都没生效。默认控件还是存在