The resignation of the secretary and his assistant means that they believe that the corporations laws or another act or the ASX listing rules have been breached and that the Board refuses to remedy the breach.
...or they themselves have done something wrong.
The company secretary has a duty to the board, not Alan.
Anyone's guess, trading while insolvent, breaching the QSA come to mind. The secretary only has one option - resignation, if they cannot get a remedy, or they are guilty themselves.