FRM-40735:PRE-FORM trigger raise unhandled exception ORA-04067:not executed, stored, procedure "PUBLIC.FND_TIMEZONES" does not exist.

After I log into Applications, and when I click on responsibility, and when I'm in the Form to retreive the Navigator page, I got the above error.
If I click on any one of the menu from the list, I automatically gets log off. "your logon session has become invalid".

please help...