ENTER_FRAME only executes once and not every frame

I have an ENTER_FRAME event which is supossed to run every frame but it just runs when an if statement is true and only once and not every single frame.

1. public function update(e:Event):void
2. {
3.      if(canFire == true)
4.      {
5.           trace("The two statements are true");
6.           var newBullet:Bullet;
7.           newBullet = new Bullet(gadjet.x, gadjet.y);
8.           bulletsArray.push(newBullet);
9.           mcGameStage.addChild(newBullet);
10.           newBullet.firebullet(); /* as long as this function is executing inside an enter frame's event
11.           it will make the bullet look moving  */
12.           // this is the Bullet's class firebullet() function
13.           /*public function firebullet():void
14.           {
15.               x = x + 5; // this makes the bullet look moving when using an ENTER_FRAME event
16.           }*/
17.      }
18. }

Entire class at pastebin:

[ActionScript 3] AvoiderGame4 - Pastebin.com