The same instance model name is not working

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#1

I scripted the whistle within the local script, but it didn’t work in the secondary model. So, I followed to watch my video:

When clicked on the button, it works with the same model named “Thomas”. So, I changed the instance model name, but it doesn’t work either.

There is a local script I worked in:

local Horn = game.Workspace.Thomas.Engine.Body.Whistles.Whistle.WhistleFX -- Put the Whistle/Horn if you want
local Horn2 = game.Workspace.Thomas.Engine.Body.Whistles.Whistle2.WhistleFX

local userInputService = game:GetService("UserInputService")

script.Parent.MouseButton1Click:Connect(function()
	Horn.SFX:Play()
	Horn2.SFX:Play()
	Horn.ParticleEmitter.Enabled = true
	Horn2.ParticleEmitter.Enabled = true
	wait(1.5)
	Horn.ParticleEmitter.Enabled = false
	Horn2.ParticleEmitter.Enabled = false
end)

userInputService.InputBegan:Connect(function(input, _gameProcessed)
	if input.KeyCode == Enum.KeyCode.H then
		Horn.SFX:Play()
		Horn2.SFX:Play()
		Horn.ParticleEmitter.Enabled = true
		Horn2.ParticleEmitter.Enabled = true
		wait(1.5)
		Horn.ParticleEmitter.Enabled = false
		Horn2.ParticleEmitter.Enabled = false
	end
end)

I try the FindFirstChild instance, but it doesn’t work too. How do I script with the same instance model name?