Issue with points

I have a function that when a timer hits 10 sec to add 10,000 points to score, but when I play the movie keeps adding points over and over again. How can I stop this? :confused:
Thanks in Advance

Here is the code:

PHP Code:

---

onClipEvent (enterFrame) {
if(_root.count_down==1001) {
        _root.count_down--;
        _root.score += 10000;
}
} 


---

this will happen because when count_down hits 1001
you subtract one from it

Code:

---

_root.count_down--

---

then add 10000 to the score.
if count_down is being incremented somewhere else (which it must be). then it will keep getting to 1001 and adding 10000 to the score.

why do you subtract one from count_down?