Apply Radial Damage with Falloff Not Working

I am using 4.7.5. My character I made is using TakeDamage in C++. My walls are using take any damage in blue prints as just an actor. The character actors take full damage for me while the walls seem to work correctly. This seems off to me.

I will try to use event radial damage and see if that will work. Also, could you explain the damage fall off? I should use a value of 0-1 that will determine the curve of the radius damage? Meaning that a value of 1 is linear damage?

edit: Ignore this edit.