Did you wait for Raul to come up and talk to you after these conversations, and beware the quest is unmarked. I've never had a problem from talking to ranger Andy before meeting Raul.
I think I waited for him. What do I have to do? Just stay in the same room and wait for him to say something? He talked aobut his life with Loyal and the Sniper .... I didn't have to wait that long at all.
I'm gonna give it another try tomorrow. I saved the game right outside of Andy's house. BTW, does he ever leave his home? I'd take Ranger Andy with me as a companion any day of the week!