So, i met up with nori in the border and i chose kurohime to do the quest then after that I can't start the second attack quest, when i talk to flaire she's only saying "I'm relieved jenny was released" 

Can you help me?

You need Sandra in the party, the main story event dialog with Commander Walcot to get access to the Dhranholl mine, and Moriko's event need to be advanced on either her good or bad route.