Simple rollover question

hi everyone, i’m new here and am just getting into flash. I am currently revamping my company’s website as well as my own personal portfolio. my question is simple.

I made a button that when a rollover is activated a bunch more buttons appear through a movie clip animation. so when i roll off of the button the new ones dissapear. how do i make them stay there even after i roll off of my original button? thanks.

nancybag