Spawned actor doesnt collide with non triggers

Hi dear Unreal Community,

in my current game, my maincharacter is able shooting a rocket arm. After that you play the rocket arm, flying around (Pawn actor). However, I can’t manage to make my rocket arm collide with normal objects as walls (normals cubes).

Interactions with triggers just work fine, but I dont get stopped running into a wall.

I Provide a Youtube vid (40 sec) where you see every Variable thats relevant ( I think) and you can see me flying through the walls, if that helps.

Also one screenshot because i forgot to show the mesh of the rocket…

I would be very glad to receive help as I just can’t figure out what im doing wrong!