Textbox won't display text!

programming flash
1

I’ve ran into a weird problem. I have a textbox that will display numbers, but not text!

I’m fairly certain it can’t be anything to do with the code, so could it be something to do with the properties?

var words:String = "default";
var multiplier:int = 10;
var scoreBubble:ScoreBubble = new ScoreBubble();
var score = Math.ceil(impulse.normalImpulses[0])*multiplier;
//scoreBubble.textHolder_mc.text_mc.text = score; // WORKS
//scoreBubble.textHolder_mc.text_mc.text = words; // NOTHING DISPLAYED
//scoreBubble.textHolder_mc.text_mc.text = "eh"; // NOTHING DISPLAYED
//scoreBubble.textHolder_mc.text_mc.text = words+"
"+score; // NOTHING DISPLAYED
var scoreBubblePos = contact.GetFixtureA().GetBody().GetPosition();
scoreBubble.x = scoreBubblePos.x*_P2M;
scoreBubble.y = scoreBubblePos.y*_P2M;
_game.addChild(scoreBubble);
trace("hit");