I dont know if this is what you want. But give it a try.
If you dont already have it, create a new layer and call it Actionscript.
Insert a keyframe where you want the movie to stop.
Open up the Actionscript window and choose Stop, from Actions - Moviecontrol
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| I from Portugal and i need your help
| I'm making a buttonn winth with a submenu (the button have 3 choices) and
i don't know how to stop the submenu in way to choose one of the 3 choices.