Player's right hand doesn't rotate?

I'm trying to get the right hand to rotate, but it doesn't rotate. What am I doing wrong?

CharacterSetup.OnServerEvent:Connect(function(player)
	
	local Ball = game.ServerStorage.Ball:Clone()
	
	Ball.Parent = player.Character
	
	local Weld = Instance.new("Weld", Ball)	

	Ball.Size = Vector3.new(0.6, 0.6, 0.6)

	
	player.Character.RightHand.Rotation = Vector3.new(90, 0, 0) --this part here
	

	Weld.Part0 = Ball
	
	Weld.Part1 = player.Character.RightHand

	Weld.C0 = CFrame.new(0, 0.4, 0)

	
	
	
end)

Thanks!