What's the error in this script? (R15 script converted to R6 script)

I am having with this script, the issue is that this script was originally built for R15 but I am using it for R6 I have changed "RightHand" and "LeftHand" to Right Arm and Left Arm. This script is suppose to deal damage once a player is punched but it is not dealing damage when a player is hit.

math.randomseed(tick())

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local punchEvent = Instance.new("RemoteEvent", ReplicatedStorage)
punchEvent.Name = "PunchEvent"

local animations = {867498850, 867520587} 

local function onPunchFired(plr)
    local char = game.Workspace:FindFirstChild(plr.Name)
    local humanoid = char.Humanoid
    local animation = Instance.new("Animation")
    local picked = math.random(1, #animations)
    animation.AnimationId = "http://roblox.com/asset/?id="..animations[picked]
    local animTrack = humanoid:LoadAnimation(animation)
    animTrack:Play()
    local dmgScript = script.DmgScript:Clone()
    if picked == 1 then
        dmgScript.Parent = char.Right Arm
    elseif picked == 2 then
        dmgScript.Parent = char.Left Arm
    end
    dmgScript.Disabled = false
    wait(0.4)
    dmgScript:Destroy()
end

punchEvent.OnServerEvent:Connect(onPunchFired)

local UserInputService = game:GetService("UserInputService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local punchEvent = ReplicatedStorage:WaitForChild("PunchEvent")

local ready = true

local function punch(inputObject, gameProcessed)
    if inputObject.KeyCode == Enum.KeyCode.Q and ready then
        punchEvent:FireServer()
        ready = false
        wait(0.5)
        ready = true
    end
end

UserInputService.InputBegan:Connect(punch)

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