Createtextfield where do I go wrong?

1 

	_root.createTextField("username1", 1, 10, 10, 200, 20);
	//username1.type = "dynamic";
	username1.embedFonts = true;
	username1.border = true;
	username1.text = "Show this";
	username1.selectable = false;
	//username1.autoSize = true;
	defaultFormat = new TextFormat();
	defaultFormat.font = "Verdana";
	defaultFormat.textColor = 0x000000;
	username1.setTextFormat(defaultFormat);