Collection Element tutorial example

Hi,

i try to execute the tutorial example, but the code didn't display any result why ??

index.xml

<Alloy>
    <Collection src="book" />
    <Window>
        <TableView id="table" />
    </Window>
</Alloy>

var library = Alloy.Collections.book;
 
// added new row 
var b = Alloy.createModel('book', { 
   title : 'Great Expectations', 
   author: 'Charles Dickens' 
});
library.add(b); 
b.save();
 
library.fetch();
$.index.open();

Note

• i create new model (book) contain two element title and author