ok, i,ve got 4 lv 5 chocobo's and sent a all 5 diff lvs on successful treasure hunts three times and STILL clasko wont let me in the cave ruins.

is there anything else 2 do. i,ve just got 100%, beat angra manyu and experiment and only have via infinto (i say only) 2 do after this. i hate it when i hit these dead ends. could anyone help me here?