Ahoy all, been doing some experimenting in flash.
I found some great tutorials for creating button using action scripted movie clips instead of buttons with movie clips in them since those can be prone to typical flash problems.
I learned this technique from 2 different tuts.
It basically uses AS similar to calling instance names but instead targets the frame labels.
the link for the tutorial is
remember that you are calling for frame labels not instance names, they are labeled in the same way. Select the key-frame and and in the PROPERTIES PANEL insert the label, it should be the text block at the top of the panel.
Have fun, enjoy.