Physics simulation not working on imported mesh

Created mesh in blender. Have imported to UE4. Collision complex as simple. Checked simulate physics.

Gravity not working on mesh, no response if hit by player.
If i add standard sphere - physics work on it. but not on mine mesh.
What am i doing wrong?

(Object set to movable)

Solution: Physics simulation does not work with “collision complex as simple”. So collision needs to be just “simple”.

Nothing Is Working… BRU!

Hi Where Is This Setting?

Nvm Found It, Its In Physic Assets And Select The Bones And In Detail Panel