Problem in render a model in XNA

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XNA4.0

Hi . I down this :
http://thefree3dmodels.com/stuff/aircraft/sci_fi_airship/15-1-0-430

then Import in blender then export to fbx file;
but when I render it basicly it's be black and have no color. What should I do ?

I render that like this :

public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        Matrix world;
        Matrix projection;
        Matrix view;
        Model model;
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }


        protected override void Initialize()
        {
            world = Matrix.Identity;
            view = Matrix.CreateLookAt(new Vector3(20, 20, 20), Vector3.Zero, Vector3.Up);
            projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, graphics.GraphicsDevice.Viewport.AspectRatio, 1, 1000);

            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            model = Content.Load<Model>("SpaceShip/SpaceShip");
        
        }

        protected override void UnloadContent()
        {

        }


        protected override void Update(GameTime gameTime)
        {

            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();



            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);
            foreach (ModelMesh mesh in model.Meshes)
            {
                foreach (BasicEffect effect in mesh.Effects)
                {
                    effect.World = world;
                    effect.View = view;
                    effect.Projection = projection;
                    effect.EnableDefaultLighting();
                }
                mesh.Draw();
            }
            base.Draw(gameTime);
        }
    }