Hi, Troy. It works if I apply it as a circle or a rectangle... What I need is a rectangle with a hole in the middle.
If you set a solid fill, then draw a rectangle, then drwa a circle, then put it on the stage (addChild), you have the effect Im after (the rect with the hole). But when I apply it as a mask, it doesnt works... The link you posted had examples of "simple" shapes as masks: several rect, several circles... Anyways, as soon as I figure out a solution, Ill let you know.

