DOMScene removeChild occur "Uncaught TypeError: Cannot call method 'removeChild' of null "

[AaronRZH]

I use DOMScene to display a Element, but when I remove this element from DOMScene occur an error.

    CtrlBoxSmall = enchant.Class.create(enchant.Group, {
        initialize: function(){
            enchant.Group.call(this);

            var self = this;

            var background = createSprite(jtsC.img.dialog);
            this.addChild(background);

            var photo = createSprite(jtsC.img.photo);
            photo.x = 100;
            photo.y = 100;
            this.addChild(photo);

            var camera = createSprite(jtsC.img.camera);
            camera.x = 210;
            camera.y = 105;
            this.addChild(camera);

            var record = createSprite(jtsC.img.record);
            record.x = 110;
            record.y = 170;
            this.addChild(record);

            var save = createSprite(jtsC.img.save);
            save.x = 285;
            save.y = 280;
            this.addChild(save);
            save.addEventListener('touchend', function(){
                jtsC.currentPerson.setPhoto(jtsC.selectImage);
                jtsC.selectImage = null;
                self.parentNode.removeChild(self);
            });

            var close = createSprite(jtsC.img.close);
            close.x = 330;
            close.y = 10;
            this.addChild(close);
            close.addEventListener('touchend', function(){
                self.scene.removeChild(self);
            });
        }
    });

Uncaught TypeError: Cannot call method 'removeChild' of null enchant.js:5346
enchant.DomlessManager.enchant.Class.create.removeManager enchant.js:5346
enchant.DomLayer._detachDomManager enchant.js:5558
enchant.DomLayer.enchant.Class.create.initialize.__onchildremoved enchant.js:5433
enchant.EventTarget.enchant.Class.create.dispatchEvent enchant.js:1474
enchant.Group.enchant.Class.create.removeChild enchant.js:4843
enchant.Scene.enchant.Class.create._onchildremoved enchant.js:6116
enchant.EventTarget.enchant.Class.create.dispatchEvent enchant.js:1474
enchant.Group.enchant.Class.create.removeChild enchant.js:4843
(anonymous function) core.js:746
enchant.EventTarget.enchant.Class.create.dispatchEvent enchant.js:1474
enchant.Core.enchant.Class.create.initialize enchant.js:1914

How to fix this? Or I am using DOMScene in the worng way?