Interactive Flash below a DIV Layer

Hello,

I am trying to create a website that has a DIV layer above my flash movie.

I can visually do this, by changing the z-index of the flash div layer so it is below the banner but when I do this, I cannot interact with my flash movie.

To my knowledge, this is a problem in Firefox, it is fine in Internet Explorer.

Is it possible to do this at all?

Thanks in advance for helpful replies and discussion.