AS2 Button trouble

Complete newbie with flash.
Playing with making a gallery. Very simple, three images, three thumbnails. Made thumbnails buttons, added some action script for alpha highlights on rollover and to jump to the appropriate images using:

on (release) {
gotoAndPlay(“img1”);
}

Everything works great. Put a simple fade in for the images and works exactly as I would expect.
Decided to add a welcome frame at the beginning with button that says “Enter” and added the following actionscript:

on (release) {
gotoAndPlay(“thumbMenu”);
}

Nothing happens when the button is clicked. About to go nuts. Been trying to fix it for hours. Wasn’t expecting to get stumped this early on something so simple.

Any common mistakes that would cause this?