MovieClip Buttons that will continuously play

I have a few flvs made from After Effects that are now movieclip symbols that I have to use as buttons. My problem is that I want those movieclips to continuously play even without doing a mouse rollover. Then, when it’s rollover, rollout, or click time, another animation will play within the movieclips that I’m going to use as a button.

Is there a way to do this?