Forms Personalization on INVMWBIV

Hi,

  I am trying to add personalization to the Materials Workbench form. I need to add a new menu that in turn calls a PL/SQL procedure. But I should be able to add the menu to "Lot On Hand Quantities" Form i.e., LOT_DETAILS Block. The menu item I added is visible under Tools on Materials Workbench window, but when I go to "Lot On Hand Quantities" window, even the Tools is disabled. I saw few posts mentioning problems using personalization on INVMWBIV form. I want to see if anyone was able to perform any personalizations that included menus on this