How can I make a trail activate and connect when I hold left shift?

So, I've been trying to make a trail work when I hold down shift, but it keeps saying Trail isn't a valid child of Server Storage. Here's my script.

local Player = game.Players.LocalPlayer
local Character = Player.Character
local UserInputService = game:GetService("UserInputService")

UserInputService.InputBegan:Connect(function(key)
    if key.KeyCode == Enum.KeyCode.LeftShift then
        game.ServerStorage.Trail.Enabled = true
    else
        game.ServerStorage.Trail.Enabled = true
    end
end)

BTW I'm trying to connect it from the head to Humanoid Root Part, but didn't know how to do that.