While in Castle Valette, you will find a portion of the castle where you see a glyph on the wall. Sheathe your sword and read it to see that it says "The crimson flame engulfs the alabaster bird, which ever-hungry feeds on azure skies, clouds that cover amber lands, sealing in, onyx seas whose waters quench wild fire. repeat the cycle to weave the path together". That is your hint to get thru the maze. It translates as red floor panel go through white door, white floor panel go through blue door, blue floor panel go through yellow door, yellow floor panel go through pink door, pink floor panel go through red door. Note: If no colors are appearing on the doors, make sure all your party members are completely inside the room and the door you walked through is closed.