Can someone tell me whats wrong with this animation?

local enabled = true
mouse = Player:GetMouse()
function onKeyDown(key)
if not enabled then return end
enabled = false
    Key = key:lower()
    if key == "x" then

local animation = Instance.new("Animation")
    animation.AnimationId = "http://www.roblox.com/Asset?ID=220836646"

        local player = game.Players.Character


            local animTrack = player.humanoid:LoadAnimation(animation)
            animTrack:Play()


        wait(2)
    enabled = true
end

            mouse.KeyDown:connect(onKeyDown)

The animation should play once I press X But it wont, can somebody tell me whats wrong with it?