Priest Obligation cannot use SES?

[Aisuhoshi]

non. I just logged in and tried to use SES on it. Did relog and try it as well, nothing seem to work. Any idea?
On the side note. Same log in, I did successfully upgrade other skills.

I know this is an old thread, but since I've been asked this when I was still playing and apparently it's still a problem in the game and this might help others..

When you're SESing Obl, just aim your SES near the "P" in "Priest."

Note how the SES appears there, and the Obl slot appears empty