Simple problem with attachMovie

any ideas why this doesn’t work? It just doesn’t attach anything or invisible MC. If I remove the _width and _height parameters it works fine?

doesn’t work:
[AS] attachMovie(“bronze”, “bronze_mc1”, e, {_x:brickWinner2._x, _y:brickWinner2._y, _width:brickWinner2._width, _height:brickWinner2._height}); [/AS]

works:
[AS] attachMovie(“bronze”, “bronze_mc1”, e, {_x:brickWinner2._x, _y:brickWinner2._y}); [/AS]