Coding_Strategies Error in demo

im walking trough the Coding_Strategies pages and tryed the demo there Why does this give an error?

error

[ERROR] Syntax Error = Parse error at ui.js (line 5)
[ERROR] Script Error = 'undefined' is not an object (evaluating 'myapp.ui.createApplicationWindow') at app.js (line 7).

// create an object literal to be your app's namespace
var myapp = {};
// include necessary libraries
Ti.include('ui.js', 'other_library.js');
 
// instantiate and open the main UI component of our app
myapp.mainWindow = myapp.ui.createApplicationWindow();
myapp.mainWindow.open();

// create a self-calling function
(function(){
    myapp.ui = {}; // this sub-namespace extends the app's namespace object
 
    myapp.ui.createApplicationWindow() {
        var win = Ti.UI.createWindow({
            backgroundColor:'white'
        });
 
        var header = Ti.UI.createLabel({
            text: 'My App Heading',
            top: 10,
            height:'auto',
            width:'auto'
        });
        win.add(header);
        return win;
    };
})();

that fixes it, should have seen that myself do :D