Textfield within MC interferes with buttonMode

Scenario: a Movieclip used as a button contains the background graphic on the bottom layer and a dynamic textfield on the top layer. The AS 3 code used for this MC uses buttonMode to enable the cursor, but the textfield (gameButton.label) is interfering with this. Anyone know why?


        public function showGameButton(buttonLabel:String) {
            gameButton = new GameButton();
            gameButton.label.text = buttonLabel;
            gameButton.x = 220;
            gameButton.y = 300;
            gameButton.buttonMode = true;
            gameButton.useHandCursor = true;
            gameSprite.addChild(gameButton);
            gameButton.addEventListener(MouseEvent.CLICK,pressedGameButton);
        }