Why does the animations keeps stopping?

Hey, I've made an melee script which makes different animations each time you click, but those animations keep stopping when it is not suppsoed to, they are being interrupted for some reason, i wanted to know how can i make it so that the animations not stop randomly when you fight, here a section from the server script in the tool which makes animations:

moderemote.OnServerEvent:Connect(function(player , currentart)
	if currentart == "SwingRight" and fighting == false then
		local anim = Instance.new("Animation")
		anim.AnimationId = "http://www.roblox.com/asset/?id=3249246694"
		local playAnim = humanoid:LoadAnimation(anim)
		playAnim:Play()
		fighting = true
		effect.Octave = 1
		sound.TimePosition = 0
		sound.Playing = true
		wait(0.6)
		fighting = false
	end

not full script

What should i do to fix that bug? (all the animations work)

I have had this problem many times before. I believe what you need to do is set the animations Priority in the Edit tab to "Idle" that should force the animation to play without any problems.