Button Linking

Hi, I’m having a slight problem with linking my buttons.

For example, if I have a flash document newly opened and I create four layers, I would have, on one layer, a keyframe. On there, a movie-clip and a button. These are animated etc. over a timeline, however not on the main one with four layers, instead the timeline you find when you double-click the mc/button, which has just the one layer (from which you get back to the main four layers by clicking Scene 1 etc.)

What I would like to know is how do I link the button on this, so-called, sub-timeline with one layer, to a frame and a different timeline found in the main section of four layers.

I hope you know what I mean, if not, I’ll try to clarify. Thanks for any help.