How can I get my ImageButton to, when clicked, be detected by my script?

game.Players.PlayerAdded:Connect(function(player)
    local CurrencyValue = Instance.new("NumberValue", player)
    CurrencyValue.Name = "Currency"
    CurrencyValue.Value = 0
end)

workspace:WaitForChild("Money").ClickDetector.MouseClick:Connect(function(player)
    player.Currency.Value = player.Currency.Value + 69
end)

workspace:WaitForChild("Blackmarket").Shop.Box.Pistol.MouseButton1Click:Connect(function(player)
    print("here")
    if (player.Currency.Value -69) >= 0 then
        player.Currency.Value = player.Currency.Value - 69
    end
end)

This is the full Script. What it does is creates a NumberValue in the player's folder, and that NumberValue represents the player's cash.

workspace:WaitForChild("Money").ClickDetector.MouseClick:Connect(function(player)
    player.Currency.Value = player.Currency.Value + 69

Here, it updates the NumberValue to 69 when the part 'Money' is clicked.

workspace:WaitForChild("Blackmarket").Shop.Box.Pistol.MouseButton1Click:Connect(function(player)
    print("here")

This is the part which does not work. I'm trying to now take away the money when an ImageButton is clicked.

Blackmarket - Part || Shop - ScreenGUI || Box - Frame || Pistol - ImageButton

I can't get 'here' to be printed, which means the rest of my script won't work.