Why Does This Client-Sided Script for Hovering Over a Button Not Work with FilteringEnabled?

I have a SurfaceGui that is deposited into the player's PlayerGui and adorned to a part in the Workspace.** When I test it in the Studio, the image changes just fine, but in a server, nothing happens! Since the gui is client-sided, shouldn't this work?** I'm pretty new to FilteringEnabled, so there may be much that I need to learn.

This is my script, which is in the SurfaceGui of the PlayerGui.

debounce = false

script.Parent.MouseLeave:connect(function()
    if debounce == false then
        debounce = true
        script.Parent.Image = "http://www.roblox.com/asset/?id=615227711"
    end
    debounce = false
end)

script.Parent.MouseEnter:connect(function()
    if debounce == false then
        debounce = true
        script.Parent.Image = "http://www.roblox.com/asset/?id=615242781"
    end
    debounce = false
end)

At the start of the game, this SurfaceGui is deposited into the Player's PlayerGui and then adorned to a part via this RemoteEvent in the Workspace.

script.SetAdornee.OnServerEvent:connect(function(player)
    local p = game.Players:WaitForChild(player.Name, 10)
    local findGui = p:WaitForChild("PlayerGui", 10)
    local giveGui = game.ServerStorage.Gui.TitleGui:Clone()
    giveGui.Parent = findGui
    giveGui.Adornee = game.Workspace.StartMenuArea.Classroom.Board
end)

This LocalScript in the StarterPack fires the RemoteEvent at the start of the game.

player = game.Players.LocalPlayer
game.Workspace.RemoteEvents.SetAdornee:FireServer(player)

Any and all help is most certainly appreciated!