I'm making a gun but it keeps coming back with "This mouse is no longer active"

Any help would be nice.

here is the script that the error is coming from.

local tool = script.Parent.Parent
local user

tool.Equipped:connect(function(mouse)
	script.Parent.Parent.Loaded:Play()
    user = tool.Parent
	local player = game.Players:GetPlayerFromCharacter(user)
	print("Equipped!")

function Fire()
        local ray = Ray.new(tool.Hole.CFrame.p, (mouse.Hit.p - tool.Hole.CFrame.p).unit * 300)
        local hit, position = game.Workspace:FindPartOnRay(ray, user)
        local humanoid = hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid")
        if humanoid then
            humanoid:TakeDamage(100)
        end
        local distance = (position - tool.Handle.CFrame.p).magnitude
        local rayPart = Instance.new("Part", user)
        rayPart.Name          = "RayPart"
        rayPart.BrickColor    = BrickColor.new("New Yeller")
        rayPart.Transparency  = 0.5
        rayPart.Anchored      = true
        rayPart.CanCollide    = false
        rayPart.TopSurface    = Enum.SurfaceType.Smooth
        rayPart.BottomSurface = Enum.SurfaceType.Smooth
        rayPart.Material      = Enum.Material.Plastic
        rayPart.formFactor    = Enum.FormFactor.Custom
        rayPart.Size          = Vector3.new(0.2, 0.2, distance - 6)
        rayPart.CFrame        = CFrame.new(position, tool.Hole.CFrame.p) * CFrame.new(0,0,-distance/2) 
        game.Debris:AddItem(rayPart, 1/30)
		script.Parent.Parent.Ammo.Value = script.Parent.Parent.Ammo.Value - 1
		wait(.1)
		end
	end)

game.ReplicatedStorage.Events.PPSH.OnServerEvent:Connect(function()
	Fire()
end)
Anonymous