Can someone help me with FireClient() and OnClientEvent not working?

I have a script meant to give me an item, and I can't get the remote event to work with FireClient. Here's what I have so far:

localscript:

script.GiveItem.OnClientEvent:Connect(function(item,amount)
--item giving code didn't put because it's too long
end)

normal script:

canGive = true


script.Parent.Touched:Connect(function(hit)
    if canGive == true then
    canGive = false

    play = game.Players:GetPlayerFromCharacter(hit.Parent)

    play.PlayerGui.Inventory.InvScript.GiveItem:FireClient(play,"CopperShortsword",1)

    end
end)

Notes: -play is not null, I already tested that -the problem isn't with the item giving code, tested that too