Events/Mesages/Overrides don't work

Hi all, suddenly happens that the grid content por the Events, Mesages and Overrides, for form designs and classes definition, are empty. I meant the buttons are ther but the grid content are empty, ther is no any row. Before all where well. How to get them come back?

need your help.

Lol? What the hell is the question? What do you want to know? Post code nao. There is no such thing as "It was there but now it is gone".