How to kill a player from an object value?

hi, i made a gun script that has a objectvalue that test if that value has a humanoid. if it does it removes some health. but it won't damage anything? please help!

local plr = game.Players.LocalPlayer
local char = plr.Character
local target = script.Parent.Target
local tracking = false
local canuse = true
local mouse = plr:GetMouse()

script.Parent.Equipped:Connect(function()
    tracking = true
end)
while wait() do
    if tracking == true then
        target.Value = mouse.Target
    end
end
script.Parent.Activated:Connect(function()
    if target.Value.Parent.Humanoid ~= nil then
        target.Value.Parent.Humanoid.Health = target.Value.Humanoid.Health-10
    end
end)
script.Parent.Unequipped:Connect(function()
    tracking = false
end)