Mouse Listener - Can't remove - Help!

Here is the code I am using. In following frames it still is registering the mouse down for the mouse listener. How do I remove it? Thanks for your help in advance!

this.mouseListener = new Object (this);
this.mouseListener.onMouseDown = function () {
if (this.rightClick_mc.hitTest(_root._xmouse, _root._ymouse, true) != true) {
this.gotoAndPlay(69);
}
}
this.mouseListener.onMouseUp = function () {
this.Mouse.removeListener(this.mouseListener);
}