My RemoteEvent only prints what I want in Solo mode, How do I fix this?

Here is the local script

local Gui = script.Parent
local player = game.Players.LocalPlayer
Gui.BackgroundColor3 = Color3.new (0, 151/255, 111/255)
function sw()

    if Gui.BackgroundColor3 == Color3.new (0, 151/255, 111/255) then
        Gui.BackgroundColor3 = Color3.new(208/255, 174/255, 0)
        print ("Works")
        wait(3)
        Gui.BackgroundColor3= Color3.new(1, 6/255, 26/255)
        local k = game.ReplicatedStorage.IDCard:Clone()
        k.Parent =  player.Backpack
    game.Workspace.MyServerEvent:FireServer()
    else
    wait (2)
    game.Workspace.MyServerEvent:FireServer()
        Gui.BackgroundColor3= Color3.new(1, 6/255, 26/255)
wait (1)
    end
end

Gui.MouseButton1Down:connect(sw)
game.Players.PlayerRemoving:connect(function(player)
    if player.Backpack.IDCard == "k" then 
        Gui.BackgroundColor3 = Color3.new(0, 152/255, 111/255)
    end
end)

Here is the other script

local event = Instance.new("RemoteEvent")
event.Parent = game.Workspace 
event.Name = "MyServerEvent" 
event.OnServerEvent:connect(function()
    game.StarterGui.ScreenGui.Frame.TextButtonss.BackgroundColor3 = Color3.new(1, 6/255, 26/255)
    print ("Color has been changed in the server")
end)

What I'm trying to do ,is, when a player clicks on the textbutton they receive a key and the textbutton gui turns red for the WHOLE SERVER, so everyone knows that the room is booked out.