Problem z blokadą w GUI / TUSKE

Cześć,
Mam taki problem, gdy robie GUI ono działa, ale sama blokada nie działa tak jak chce.

Kod:

on inventory click:
	if name of player's current inventory is "&c&lCrafts&a&lMC&f&l.pl &8| &6&lKOWAL":
		clicked slot is 11:
			open chest inventory named "&c&lCrafts&a&lMC&f&l.pl &8| &6&lNAPRAWA" with 3 rows to player
			wait 2 tick
			set slot 0,1,2,3,4,5,6,7,8,9,17,18,19,20,21,22,23,24,25,26 and 27 of player's current inventory to red stained glass pane named "&7" with lore ""
			set slot 10,11,15 and 16 of player's current inventory to lime stained glass pane named "&7" with lore ""
			set slot 13 of player's current inventory to anvil named "&aNapraw przedmioty" with lore "&7Kliknij &aLPM &7i napraw przedmioty" 

Otwiera mi samo menu, ale gdy chce zrobić blokade danego slota, to blokuje mi slot w GUI oraz w ekwipunku gracza, co nie daje mi pewnych mozliwosci.

Kod blokady 

on inventory click:
	if name of current inventory of player is "&c&lCrafts&a&lMC&f&l.pl &8| &6&lNAPRAWA":
		clicked slot is 0:
			cancel event

on inventory click:
	if name of current inventory of player is "&c&lCrafts&a&lMC&f&l.pl &8| &6&lNAPRAWA":
		cancel event

Jak zrobić, by kod nakładał tylko blokade na GUI, a nie ekwipunek gracza