I am stuck on tales of symphonia, can anyone help?

ugh, i know i asked this question before but i got stuck again. ok so i finished the balacruf mausoleum, after that i dont know what to do. I have visited Luin, Hima and the tower of mana. nothing happens at any of them!!!! I have no freakin clue what to do next. can someone please help me?!?