I am a level 14 Sentinel. I can't get the advanced trainer to train me (or even talk to me). I talked to him and he won't train me even after I have leveled up. I have read that there is supposed to be a quest to do before you get access to your advanced class skills. I can't figure out the quest I am supposed to do, or even if I have gotten the quest yet. Can someone help me out with the name of the quest and how to get it if I don't have it? Thanks!