Why doesn't this BoolValue change?

I have one script that when a humanoid dies it removes the humanoid and sets a BoolValue to true

function onHealthChanged()

    script.Parent.CurHealth.Text = script.Parent.Parent.Parent.Humanoid.Health
    if script.Parent.Parent.Parent.Humanoid.Health == 0 then
        script.Parent.Parent.Parent.Parent.Dead = true
        script.Parent.Parent.Parent.Humanoid:remove()


    end
end

script.Parent.Parent.Parent.Humanoid.HealthChanged:connect(onHealthChanged)

and another script that when the BoolValue is true it removes a part

if script.Parent.Dead.Value == true then
    script.Parent.Wall:Destroy()


    end

but it doesnt remove the part and in the output it says Dead (The BoolValue) is not a valid member of model