How come my script breaks whenever I jump but works fine when I walk?

This script is supposed to make it so that if I try to jump or walk as the animation plays nothing will happen but after the animation is done i can. It works when only walking is involved but whenever i jump before or after the animation i can no longer play the animation. Help?

Player = game.Players.LocalPlayer Tool = script.Parent.Parent Animation = script:WaitForChild("Animation") Enabled = true Tool.Equipped:Connect(function(mouse) mouse.KeyDown:Connect(function(key)

    if not Enabled then return end
    Enabled = false



    if key == "j" then
    local Humanoid = Player.Character.Humanoid
        local animationtrack = Player.Character.Humanoid:LoadAnimation(Animation)
    Humanoid.WalkSpeed = 0
    Humanoid.JumpPower = 0
        animationtrack:Play()
        wait(2)
        Humanoid.WalkSpeed = 20
    Humanoid.JumpPower = 20


    wait(.5)
        Enabled = true
    end
end)

end)