How do I make a premade animation play?

I have made 3 animations and am trying to play one of them. They are in StarterCharacterScripts and

    warn("PLAYING ANIMATION FOR "..plr.Name)
            local humanoid = plr.Character:FindFirstChild("Humanoid")

            local animationTrack = humanoid:LoadAnimation(plr.Character:FindFirstChild("AMS_HoldAnim"))
            animationTrack:Play()

doesn't work. Please help urgently.