Mise Hors Tension programmée + vlc = problème

on run
	-- Affichage de la fenetre demandant le temps de la minuterie
	repeat
		try
			-- fenetre de dialogue
			set question to ¬
				display dialog "LP - Dans conbien de temps veux tu éteindre l'iMAC? (inserez en minutes)" default answer ""
			-- stockage de la valeur dans 'time_amount'
			set the time_amount to the text returned of the result as integer
			-- si le nombre existe on sort de la boucle
			if time_amount is greater than 0 then exit repeat
			--Si annulation:
		on error number error_number
			if the error_number is -128 then return "user cancelled"
		end try
	end repeat

	-- confirmation (+annulation)
	try
		set confirmation to ¬
			display dialog "LP - L'iMac va s'étteindre dans: " & time_amount & " min !" buttons {"non", "oui"} default button 2 giving up after 3
		-- stocke la reponse dans 'answer'
		set answer to button returned of confirmation
		
	on error number err_confirmation
		if the err_confirmation is -128 then
			set answer to "cancelled"
		end if
	end try
	
	-- Minuterie + Action Shutdown:
	if answer is equal to "oui" then
		-- minuterie que exécutera la suite du script après le délais configuré plus haut
		delay time_amount * 60
		-- on kill le programme qui fait ch...
		try
			do shell script "killall VLC"
		end try
		-- on lance la mise hors tension
		ignoring application responses
			tell application "Finder"
				shut down
			end tell
		end ignoring
	end if
end run

on run
	ignoring application responses
		tell application "Finder"
			shut down
		end tell
	end ignoring
end run