Help! Button on() actions not reacting [renamed]

I’ve worked for at least 4 hours on this problem, and it was yeliding no results. It’s a button, that was supposed to play the playhead backwards. Eventually, I stripped the button of all it’s function, and just left:

on (release, rollOver, rollOut, press) {
    trace("Going Up!!");

I added the extra rollover, rollout, and press just in case. When I tested the flash and clicked the button, however, I got nada. No output window. I made sure the code was on the correct button. Is there an obvious mistake I’m making?