rollOut of stage?

Hi,
Iv got a problem where a button that covers the stage:

  • when the button is rolled over a menu slides out
  • when the button is rolled out the menu slides away

BUT…

the menu has buttons and its behide the invisible button (MASK)…
So i move the menu in front of the mask but when you go over the menu buttons it stuffs up because you rolled out of the mask.
Follow me so far?

SO…

Im trying to remove the mask and create some sort of stage rollout…
When you roll out of the whole movie the menu slides away.

Can someone please help me?

Thanks,
Lex