Display score in Game Over screen?

I’m making my first AS3 Flash game. It’s a little side-scroller that is working perfectly, based on the structure from this tutorial.
Basically I have different movie clips for the splash screen, the game itself, and the gameover screen. But I’m having a tiny problem where I am trying to get the score, which is working on the game screen movieclip, to show up on the gameover movie clip.

Score is calculated in the_game_itself.as like this:

if (event.target.hitTestObject(hitMc)) {
		event.target.width = 0;
		event.target.height = 0;
		preyCount++;
		//trace("score +1");
		score.text = String(preyCount);

	}

And the gameover screen has a dynamic text box called gameScore. How do I transfer over the value of score to the gameover movieclip? I’m not sure how to call it in gameover.as Class file without getting “Access of Undefined property”.