Blueprint spawning issue

Hello! I have a strange problem with trying to spawn decals or particle emitters with blueprints.
I’m trying to spawn a decal and an particle emitter by using blueprints. But its not working.

I have tested with multiple different decals and particle emitters, but nothing works.
But I got this working on an other project with the same blueprint. So I think there is something wrong with my project.

Here is the picture of my test decal (on the left) and test particle system (right). In this picture they are simply dragged from the content browser to the scene and they are working fine.

But in this picture I’m trying to spawn the same decal and same particle emitter on the same spot with using the blueprint. Everything seems to be working fine in the blueprint, but nothing is being spawned.

Ooops! Seems like it was working all the time in game, but all I did was just trying to simulate the scene :S

Thanks anyway!