[RESOLVED] Textfield issues

[Wisconsin]

I create a textfield in a MC....

var feedback_txt:TextField= new TextField();
feedback_txt.type=TextFieldType.DYNAMIC;
feedback_txt.x=firstPart+5;
feedback_txt.y=45;
feedback_txt.selectable=false;
feedback_txt.antiAliasType=AntiAliasType.ADVANCED;
feedback_txt.width=secondPart;
feedback_txt.height=25;
if (makeTextFields=="true") {
    nextQuestion_mc.addChild(feedback_txt);
}
feedback_txt.setTextFormat(myFormatPurple); 

I can see my text field and I can manipulate the mc with a tween and everything loads fine.

I have a function triggered from a timer that changes the text in the field.

trace(nextQuestion_mc.feedback_txt); 

But the textfield comes up as undefined, even though I can see it and manipualte outside the function. The function is on the main timeline, and called from the main timeline. What am I doing wrong? Thanks.