I have been away from the game for a few years. I feel stupid having to ask this, but I have forgotten so much about L2 systems & honestly they are confusing at times. I just hit level 90 & have new skills to learn. But I cannot train them. They show as new skills to be learned, but they all have small green or orange boxes with a lock icon next to them. When I click on each skill to be learned, the learn window does not pop up. Is there an additional quest or NPC I have to visit to be able to train them?