Control a movie from the library

I have a completed flash file that is in fla and swf format. I would like to import the movie to the library and control it with an invisible button the full size of the movie. I have imported the completed movie to the library but I am not sure it will work. While in the library and highlighted, it will not play in the preview screen. If someone knows of a tutorial or would point me in the right direction it would be greatly appreciated.

Thanks so much … Mike