I had that problem too, and I think it was the same level. I just kept trying over and over again until I got it. It's a matter of the candies falling down in such an order that they don’t keep firing. I don’t think this level was tested very well when it was developed. I am on a level over 17,000 and I ran into another level that was doing the same thing. I too had to exit the game and start over. I was lucky, this time the game only went nuts for two or three efforts.