Scrolling Dynamic XML Text

I have succesfully created a scrolling text field that is marked as dynamic. My problem is loading the XML text into it once I place it within a movie clip.

So I have a dynamic text filed in movie clip A which is masked by movie clip B and then has a custom scroll bar attached to scroll the content.

When I try to import text to place in the dynamic text field ( rather than typing the text within flash ) it doesnt show up.

Thoughts?