Haven't modified anything till found that problem.
Using L2jaCis.
Been implementing stuff from Frozen and Hellas together, tho nothing connected to subclasses.
after the problem was found I have modified the whole VillageMaster from 0, start off with Frozen, Hellas, Javafree and so on.
Still nothing effects the subclass change action (Remember nothing just happens while trying to change class - NO errors)