External xml, textfields, & event listeners

Hi, I am having a problem with putting text from an external xml file into multiple textfields through out the movie. I believe the problem stems from the fact that not all the text fields are loaded. The movie stops intermittently and I want certain xml child to be shown, then later in the movie a different child. I keep on getting the Error #1009 and I am wondering what event listener I should use to solve this. I can trace out the data from the xml but when I put them into textfields not currently on the stage at that particular frame, I get the error. Thanks for any ideas.