Need help with a simple problem

I have an MC called “play_mc” which is a box. On the first frame within the timeline of “play_mc” is stop(); and on the second starts a animation, ending on frame 5 with stop();

Basically what I want is that when “play_mc” is clicked, it will go into the animation. The problem is whenever it finishes the animation and I click it again, it does the animation all over again.

I’ve tried writing the code like this:

on(press) {
if (_currentFrame = 1) {
} else {

But it doesn’t work. Anyone can help? Thanks in advance.

Here’s the fla: Link