Play frame in movieclip from other movieclip

I can’t see how this isn’t working:

on (release) {
_root.content_mc.gotoAndPlay(“1”);
}

The button with this funtion is nested within a movieclip on the main timeline.
‘content_mc’ is the instance name of a movie clip on the main timeline that contains frame label “1”. I want to play frame label one by clicking on this button.

Any help will be so appreciated