Dynamic textboxes - no text ?!

I have made a movie clip including dynamic text boxes.
Pressing a button I want data to be inserted in the dynamic text boxes and these should then (including the text) within the movie clip move from A to B.

Using this code: _root.new.persona.fkt.text =“text in box”;
gives me the text where I want. But when the movie clip initiates the text dissapears. Why is that ?
How do I make the text stay ?

Best regards