link to frame isnt working?

I'm trying to simply link to another frame. In the file, when the down arrow is pressed in the 2nd layer (frame 21) I want it to play starting at frame 30, labeled "to 3". I've tried this code:

on(press) {
    gotoAndPlay("to3");
}

but it doesnt seem to work, and thats quite confusing, since this same code worked in the down arrow in frame 1, and when clicked, the clip at frame 10 began playing. I dont know what is wrong. Please suggest possible problems, and look at the original file. How do I attach the file, I cant find anything that allows me to do so...