[etc]

var i:Number;
var j:Number;
var n:Number;
var m:Number;
var k:Number;
i = 0;
n = 0;
k = 0;
while (i < 4) {
	i++;
	j = 0;
	m = 0;
	while (j < 7) {
		j++;
		n++;
		var txt = _root.createTextField("text_txt" + n, n, k, 0, 200, 50);
		txt.border = true;
		txt.type = "input";
		txt._y = 0 + m;
		m = 50 + txt._y;
	}
	k = k + 200;
}
text_txt1.text="просто текст";

Работает.