Caused by: netscape.javascript.JSException: ReferenceError: Can't find variable: setData desde javafx 2.0

public class JavaFXWebBrowser extends Application {
    
    private Scene scene;
    @Override
    public void start(Stage stage) {
        // create the scene
        stage.setTitle("Caused by: netscape.javascript.JSException: ReferenceError: Can't find variable: setData");
        scene = new Scene(new Browser(),750,500, Color.web("#666970"));
        stage.setScene(scene);
        scene.getStylesheets().add("webviewsample/BrowserToolbar.css");        
        stage.show();
    }
    
    public static void main(String[] args){
        launch(args);
    }
}