Flash on top of flash - how to "z-index"?

I have two flash animations. One of them are placed in a div layer that is relative. The other one is placed in a div layer that is absolute. I want the flash animation within the absolute div to be placed on top/over the other flash animation, but in some strange way that doesn’t seem to be possible :frowning:

The flash animation that should have the lowest order/z-index is placed in a div (relative) with a z-index of -100 and the flash animation that should have the highest order/z-index is placed in a div (absolute) with a z-index of +100 (without the plus sign of course). I thought this was possible. To get two flash over each other and that I could decide which one of them going to be on top.
What is the thing that decides that one of the flash animations always should be on top?