Help me, the animations when you press a key does not work. Any suggestions?

local TM = require(script.Parent.Parent:WaitForChild("ToolManagment"))
Kick = false
Equipped = false

local power
local maxF

Tool = script.Parent
Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()

script.Parent.Equipped:connect(function(m)
	Equipped = true
end)

script.Parent.Unequipped:connect(function(m)
	Equipped = false
end)


Mouse.Button1Down:connect(function()
	if Equipped == false then return end
	if TM.GetUsing() then return end
	TM.SetUsing(true)
	TM.showPowerBar()
	TM.setWindUp(true)
local player = game.Players.LocalPlayer
repeat wait() until player.Character.Humanoid
local humanoid = player.Character.Humanoid
local mouse = player:GetMouse()


local anim = Instance.new("Animation")
anim.AnimationId = "http://www.roblox.com/asset/?id=4554918372"

mouse.KeyDown:connect(function(key)
  if key == "z" then
   local playAnim = humanoid:LoadAnimation(anim)
   playAnim:Play()

    end
end)
	power = 60
	Angle = 100
	maxF = Vector3.new(10e+006, Angle, 10e+006)
	for i=1,25 do
		if TM.getWindUp() then
			power = power + 1.6
			Angle = Angle + 275
			TM.powerUp(i/25)
			wait()
		else 
			break
		end
	end
end)

Mouse.Button1Up:connect(function()
	if TM.getWindUp() and TM.GetUsing() and Equipped then
		TM.setWindUp(false)
		Kick = true
		wait(0.7)
		Kick = false
		TM.ResetWelds()
		TM.resetPowerBar()
		wait(0.2)
		TM.SetUsing(false)
		TM.setWindUp(false)
	end
end)








Player.Character["Right Leg"].Touched:connect(function(hit)
	if hit.Name ~= "TPS" then return end
	if Kick == false then return end
	if hit.Owner.Value ~= Player then
		ChangeOwner(hit)
	end
	Kick = false
	F = Instance.new("BodyVelocity")
	F.Velocity = Player.Character["Right Leg"].CFrame.lookVector * power
	F.MaxForce = Vector3.new(10e+006,Angle,10e+006)
	F.Parent = hit
	game.Debris:AddItem(F, 0.3)
end)

function ChangeOwner(ball)
	game.ReplicatedStorage.ChangeOwner:FireServer(ball)
end