Boolean does not seam to go back to true.

Hi, I am working on a game where an actor has to take multiple hits before it is destroyed. I have the same actor copied in the game and once you start to attack one all others can not take hits until the one you are currently attacking is destroyed. I am using a boolean attribute in the game to Change Attribute to true after the actor is destroyed. It all works accept this one boolean... that is to say that after I destroy my first actor I can not land any hits on the other actors. I have it in the same Rule with Destroy this actor. What am I missing? Any feed back would be welcomed. Thanks.
Answers
Edit: aario beat me to it...