Variable not changing in remote event?

Sorry I didn't really know how to word the title I am not really that sure on what is going on but I made a script that when you mine a rock a certain amount of times it breaks and leaves an ore. When I move on to the next rock it still is using the old rocks int value rather than updating the the new rock. I tried resetting the variables back to nil when the original rock was broken but that didn't work either.

Client:

local Pickaxe = script.Parent
local Durability = script.Parent.Durability

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local RemoteEvent = Pickaxe:WaitForChild("RemoteEvent")

local Debounce = true
local Delay = 1

function slash()
	local anim = Instance.new("StringValue")
	anim.Name = "toolanim"
	anim.Value = "Slash"
	anim.Parent = Pickaxe
end


Pickaxe.Activated:Connect(function()
	if Debounce then
		Debounce = false
		slash()
		
		if Mouse.Target.Name == "CoalRock1" or Mouse.Target.Name == "CoalRock2" or Mouse.Target.Name == "CoalRock3" then
			local rockhit = Mouse.Target
			local RockHealth = rockhit.RockHealth
			
			RemoteEvent:FireServer(rockhit, RockHealth, Durability, print("RemoteEventFired"))
		elseif Mouse.Target.Name == "BronzeRock1" or Mouse.Target.Name == "BronzeRock2" or Mouse.Target.Name == "BronzeRock3" then
			print("Pickaxe too low level")
		elseif Mouse.Target.Name == "GoldRock1" or Mouse.Target.Name == "GoldRock2" or Mouse.Target.Name == "GoldRock3" then
			print("Pickaxe too low level")
		else
			print("Error")
		end
		
		wait(Delay)
		Debounce = true
	end
end)

Server

local Pickaxe = script.Parent
local RemoteEvent = Pickaxe:WaitForChild("RemoteEvent")
local CoalOre = game.ReplicatedStorage.CoalOre

RemoteEvent.OnServerEvent:Connect(function(player, rockhit, Durability, RockHealth)
	print("RemoteEventRecieved")
	
	RockHealth.Value = RockHealth.Value - 1
	print("Rock Health is now: "  .. RockHealth.Value)
	
	--Durability.Value = Durability.Value - 1
	--print("Durability is now: "  .. Durability.Value)
	
	if RockHealth.Value <=0 then
		local Rock = rockhit
		local RockPos = Rock.CFrame
		local CoalOreCloan = CoalOre:Clone()
		CoalOreCloan.CFrame = RockPos
		CoalOreCloan.Name = "CoalOreCloan"
		CoalOreCloan.Parent = game.Workspace
		Rock:Destroy()
	end
	
	--if Durability.Value <=0 then
		--Pickaxe:Destroy()
	--end
end)

If anybody could help that would be really good! :)