Animation not working second time

When I do the animation in my game for the first time it works fine, but when I stop it and then do the same thing the second time the animation doesnt play at all. The animation is looped.

local rs = game.ReplicatedStorage
local animation = Instance.new("Animation")
animation.AnimationId = "rbxassetid://7329829970"
local pressed = false
rs.Charging.OnServerEvent:Connect(function(player, value)
	 pressed = true
	if player.Skills:FindFirstChild("ManaChargeI") ~= nil then
	local char = player.Character
	local track = char:WaitForChild("Humanoid"):LoadAnimation(animation)
		if value == "IsCharging" then
			track:Play()
			local FX1 = game.ReplicatedStorage.ManaCharge:clone()
			FX1.CFrame = char.HumanoidRootPart.CFrame
			FX1.Parent = char
			game.Debris:AddItem(FX1,9999999)
			char.Humanoid.WalkSpeed = 0
			char.Humanoid.JumpPower = 0
			while pressed == true and char.Humanoid.Mana.Value < char.Humanoid.MaxMana.Value do
				wait(.1)
				FX1.CFrame = char.HumanoidRootPart.CFrame
			char.Humanoid.Mana.Value += 1
			end
			
		elseif value == "IsNotCharging" then
			char.Humanoid.WalkSpeed = 16
			char.Humanoid.JumpPower = 50
			pressed = false
			char:FindFirstChild("ManaCharge"):Destroy()
			track:Stop()
		end
	end
end)