krugos2: Sorry to hear that, it's not fun getting stuck on an adventure game because a bug won't let you complete a puzzle even if you do the right actions.
YellowEgrett: Fortunately, it was not so far from the beggining. I reinstalled game on other disc and started new one. I found a gem that I hadn't seen in previous game, so I passed this quest :) Thanks for your support!
Cool, glad to hear it worked well after reinstallation.
Just in case you haven't played the game before, there are a couple of things that can prevent you from completing the game. The first one is don't eat the apples; there are two in the game, you can eat one, but you'll need the other to complete a quest, if you eat both you'll get stuck.
The other thing is hard to explain without spoilers, just be careful to keep several saved games before you reach new areas from which you can't get back. Because there's a part in the game you'll get to a new place and if you left behind certain items you won't be able to complete the game and you won't be able to go back and get those items.
Other than that have fun! :)