Custom animations on a sword dont fully work?

I created a custom sword and sword script and it works. But when the custom animation runs his right arm doesnt follow the animation.

So you know how if you have a non animated tool and your arm just sticks out at a 90 degree angle. Thats what the players arm is doing but the rest of the body is animated. I know this probably isnt the site for this sorta question but I figured it could have to do with the script so I decided to ask it here. I want the tool to be equipped and his right arm to still play the animation. Ive seen it done before on other games so It must be possible.

local CanAttack = true
local player = game.Players.LocalPlayer

script.Parent.Equipped:connect(function()
	local character = player.Character
	local animateScript = character.Animate
	animateScript.idle.Animation1.AnimationId = 'http://www.roblox.com/asset/?id=1083822467' -- This is the animation that I am testing
	
	local attack1 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack1)
	local attack2 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack2)
	local attack3 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack3)
end)

script.Parent.Activated:connect(function()
	local attack1 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack1)
	local attack2 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack2)
	local attack3 = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack3)
	
	if CanAttack == true then
		local animationchoice = math.random(1,3)
		if animationchoice == 1 then
			attack1:Play()
			CanAttack = false
			wait(1) -- Wait however many seconds long the attack animation is
			attack1:Stop()
			CanAttack = true
			script.Parent.CanDamage.Value = true
		end
		if animationchoice == 2 then
			attack2:Play()
			CanAttack = false
			wait(1) -- Wait however many seconds long the attack animation is
			attack2:Stop()
			CanAttack = true
			script.Parent.CanDamage.Value = true
		end
		if animationchoice == 3 then
			attack3:Play()
			CanAttack = false
			wait(1) -- Wait however many seconds long the attack animation is
			attack3:Stop()
			CanAttack = true
			script.Parent.CanDamage.Value = true
		end
	end
end)

I think you might have animated it with R6 or R15 so animate with the one you use