I did'nt have any problem with HK... I just had to discuss with him to get the last INF decrease (02), then I asked him "Why didn't Revan consider the Republic as a threat ?" and I finally get the "If i have to kill a Jedi, how shoul I do ?" (smtg like that). I had an INF of 10 at this moment, so he refused to speak. Then I explored each other dialog options, to lose INF, and I repeated my question.
I let him doing his statement, and I received the first reward. I asked him to continue and after another statement I received the second one.
That's all I can say... It was automatic with me, so I hope you'll find... :/
"Do you think I seek the death of all living things? There is no victory in such things.
I do not want to win our war like this, little Jedi. When I win, I wish it to be because I was right, my teachings true."
- Kreia, Jedi Master, Sith Lord