[Toolkit for CreateJS] using SpriteSheetBuilder with HTML5 Canvas Document

Hello!

I can use SpriteSheetBuilder directly with the "init" function in exported html file. But I can't find any working example to use this class in Action Panel

This code won't work:

var builder = new createjs.SpriteSheetBuilder();

    builder.scale = 1;

    builder.maxWidth = 1024;

    builder.addMovieClip(this.mc);

    builder.build();

var spriteSheet = builder.spriteSheet;

var sprite = new createjs.Sprite(spriteSheet);

    sprite.x = sprite.y = 100;

    stage.addChild(sprite);

    sprite.gotoAndPlay(0);

Anybody can help me? Is it a bug?