For some reason animations is canceling out this script???

I've been trying to make a decent Combat Script but it just wont work properly, The Damage script im using works just fine but when i go and put it in the Combat Script it doesn't work i don't see the problem, Can anyone help me out?

  if Combat == 1 then
        print("Loading Left Punch")
        local animation = Instance.new("Animation")
        animation.AnimationId = "http://www.roblox.com/Asset?ID=906039050"
        local animTrack = player.Humanoid:LoadAnimation(animation)
        script.Damage1.Disabled = false
    animTrack:Play()
        wait(cooldown)
        db = false
        end