Remote event is not firing?

Hello i am making a hack gui. Player with gamepass enters command and then it executes to the whole server (Like changing TV image or something).

I made a script that Fire Remote event when button clicked, but when button is clicked the remote event is not fired. Can someone help?

There is no errors and no mistakes in names.

Local script (StarterGui)

local Event = game.ReplicatedStorage:WaitForChild("HackerGui").TvChangeImage

script.Parent.MouseButton1Click:Connect(function()
    print("Hello")
    Event:FireServer(script.Parent.Image)
end)

Script (ReplicatedStorage, folder called HackerGui)

local Event = script.Parent:WaitForChild("TvChangeImage")

Event.OnServerEvent:Connect(function(Player, NewId)
    print("World")
end)

it prints only 'Hello' but it doesn't print 'World'.