jumppad JumpPower not assignable?

[spark ice]

local pad = script.Parent
local force = 100
pad.Touched:Connect(function(hit)
    local player = game.Players:GetPlayerFromCharacter(hit.Parent)
    if player then
        print(player.Name)
        player.Character.Humanoid.JumpPower = force
        player.Character.Humanoid.Jump = true
        task.wait(0.5)
        player.Character.Humanoid.JumpPower = 50
    end
end)

so i have this script for a jumppad, but the jumppower is not being assigned, i always jump the same height.. could someone help please?

[wet citrus]

use jumpheight

or enable usejumppower