Personlization:Set UNIT COST as Required

[AIMAM]

Hi,

In Oracle APPS 11i Inventory module I want to set the UNIT COST field in the miscellaneous transaction as required.

I have placed the cursor in the field and went to Help > Diagnostics > Examine.
Block: MTL_TRX_LINE
Field:TRANSACTION_COST_DISPLAY

Next went to Help -> Diagnostics -> Custom Code -> Personalize:

Trigger Event: WHEN_NEW_FORM_INSTANCE

Context LEVEL USER: MINE

Actions tab. target object is MTL_TRX_LINE.TRANSACTION_COST_DISPLAY which we had checked above.. I set the REQUIRED property to TRUE. Save

When I go back to the form the field is required and the changes are affected.

But, Once I close the form and reopen it I find the field reuired property is reset to FALSE.

Can someone please tell me what's wrong exactly?