Yosayshu, if its the doors I'm thinking of, then you need to do some events with the adventurer's first to get a new dungeon where you once you beat the boss you get the key to actually fight Izana. If you haven't, go to Flames LV6 and look for yellow enemies and fight them. After the 3rd or fourth when you go back to base you should get a decent lengthed scene and a new dungeon to go in.

Вот мало ли пригодится

http://games.seiha.org/viewtopic.php?p=18164#p18164

Thanx already found =)