The complexity of the translation or bug with Cray? (Star Wars: Knights of the Old Republic 2 - The Sith Lords)

If you talk to a Cray on a personal vehicle, will be a line I want to study the laser sword battle between the line questions about the strength and personal questions about the lady. So, if you click that you want to study the light sword fight, she will say that's impossible until we find a light saber, and then in brackets [You have to find a lightsaber.]. At first, it was logical, but then I got a sword with Bao-Dur and found 2 pieces, and the answer is still the same, I need to find a lightsaber. I have already equipped her and himself with swords (both long, not short as second hand), and without swords said, constantly one and the same. Someone knows what the problem may lurk? Maybe I should find a special lightsaber or perform extra conditions?
P. S. 17 level prestige class is, trust normal, told me about yourself, Revan, etc.