User hook not working in HR forms application in PAY_ELEMENT_ENTRIES_F

Hi

I made new Package to handle Trigger for inserting / Updating / Deleting Element Entry in assignment and I follow all step to register using:

1. hr_api_hook_call_api.create_api_hook_call.
2. HR_API_USER_HOOKS_UTILITY.CREATE_HOOKS_ONE_MODULE.

but there nothing happen when inserting for example:

in PROCEDURE CREATE_ELEMENT_ENTRY_B

I write only exception to fire as below :

FND_MESSAGE.SET_NAME ('FND', 'FND_GENERIC_MESSAGE');

FND_MESSAGE.SET_TOKEN('MESSAGE', 'Test Create B');

APP_EXCEPTION.RAISE_EXCEPTION;

Thanks