PROBLEMS WITH ADVENTURE OF MARKETPLACE

Good evening, I bought The Crypt II from the marketplace, it looks very nice as an adventure map, but due to a bug I can't continue. Immediately at the beginning of the adventure I have to get some iron by knocking down a wall with the TNT, but when the TNT explodes the wall does not open (as it should) so I cannot continue the game. Is it possible to correct this problem?