Can't get anymore Signet of Capture

Ok so I own nightfall, I'm near the end of it (gate of pain), I've already captured 5 elite but now when i go to the skill trainer he won't sell me a signet. What to do? The signet of capture just dont appear under the no attribute categorie.

Sure you got any skill points left?

are you going to the same skills guy?? b\c some just don't carry it.

You've probably hit the nail on the head

Just to tidy things up:
If you do not have skill points left, you can't buy a Signet of Capture, or any other skill, from a skill trainer. However, it should still show up on the list. More likely, you are visiting a trainer who does not carry the Signet - try one of the trainers in a major city.

Or if you're in a guild with a Skill Trainer, you should be able to get one there.

That is if they have a skill trainer at thier guild hall.I don't as I don't have to many in my guild.Check your Hero tap to see if you have any skill points left