As you recall, I’ve started writing about ASP.NET AJAX during preview 5. Meanwhile, preview 6 was out and there were some changes which might break your code. One of the things which changed is the in which way you indicate controls and components declaratively. With preview 5, you’d use only a string which identifies the ID of the control or component. From preview 6 onwards, you’re supposed to use # prefix to indicate an HTML element search by ID and $ prefix to indicate that you’re searching a