new to cocoa programming.

hey guys im new to cocoa and objective-c (history with C++ and vb.net though) and i'm going through the aaron hillegass book doing the challenges and i'm doing the one in chapter 5 or 6 where you have to create a delegate with tables.

here is my project. it doesn't work.

when you type something into the text field and press the button it is suppose to add the item using delegates to the table. but for the life of me i can't figure out why it's not working. the delegates aren't getting called for some reason. any help ? 

Attachment: ToDoList.zip (2300.0KB)