Directing movieclip with button outside the movieclip

Hello I’ve got a very simple question where I cant really find an answer to. I’ve checked my old files to see if I did it before, but I couldn’t find anything. Here it goes:

On the mainstage I have a button and a movieclip. If I press this button I want the movieclip to gotoAndPlay a frame which I labeled “one”. The thing is however that I forgot the code for the button to do this.

 
on(Press){
    gotoAndPlay("one");
}

I know something has to go in front of gotoAndPlay but I forgot what. The movieclip’s name is symbol 1, and its labeled movie. I also posted the simple flash file.

http://www.xs4all.nl/~karhen/Flash/

This problem should not be very difficult to solve, and it would really help me in developing future websites. Who has the answer??