I'm having trouble completing the event sequence for Mira.  I've gotten up  to the fifth, but I can't move onto the sixth. I'm looking at the requirements on the walkthrough (I've finished the Thremten Festival, gotten her to 100 relationship, repaired the barracks, and gotten the CG with Vampire. But when I talk to her in the sleeping chamber, the event doesn't progress. She just gives the "I don't know what to do with the crystal" lines over and over again. Is there something I'm missing?