Thanks for your reply. When you told me this i started to think about it myself 
why do i let them spawn from an array when start play, you are very right its much more easy just to drag them one by one into each level, and they delete themself when i unload it :). Well i think i do it the way you told me instead. I am just try to learn Unreal by making a world with some simple cubes i can attack that respawn after some seconds when they been destroyed, and all that stuff work fine. Lol i feel stupid why i did not think about making it more easy and just drop them on the level :D. Well i guess thats the way to learn some times :). Glad for all response. Thanks allot.