[FLASH CS5] !URGENT! Custom List Class that manages Custom List Item Class

This is my first time working with a class attached to a movieclip that is nested inside a class attached to a movie clip. I’ve tested all the properties and methods of PTListItem.as and they work properly but when I try to call them on the list item through PTListTop.as it returns undefined.

The end goal is to dynamically load a checklist via a txt file.

I am attaching files and would appreciate any feedback.