Stairs&ladder use&collision

Hello everyone !

I am a beginner on the ARKDEVKIT and I have a little problem with the collision system.

When I place “SM_Stairs_Wood”, I can not climb on it except with “” creating blocking volume ". All “preset collisions” do not work in any case the “structures” / “ground” / “Blockall” do not allow to climb on it. Any idea?

Also, I wanted to know how to use “WoodStairs_Model” (ladder), because it also does not have a collision and “e” does not allow to climb on it.

While waiting for your answers, I wish you a pleasant end of the evening,
Good continuation,