[F8] someone tell me the problem here?!

[alexgeek]

christt this is annoying.
what's wrong with this:

onClipEvent (enterFrame) {
	this._y -= 5;
	this._x = Stage.width/2;
	if (this.hitTest(_root.topwall._x, _root.topwall, true) == false) {
		_root.player._alpha -= 4;
	}
}

i want the instance player (movie clip) to lower by 4 if it hits the topwall movie clip.
but all that happens is, the "player" fades away as it rises.
:S:SS:S:

[leetleet]

Well if you want to have the player's y position to move down, you don't need alpha

onClipEvent (enterFrame) {
     this._y -=5;
     this._x = Stage.width/2;
     if (this.hitTest(_root.topwall._x)) {
          this._y += 9;     //if this instance is the _root.player
     }
}