I am trying to make tax form read only by forms personalization

I am trying to make tax form on people form read only by forms personalization .

Navigation-HRMS->Enter and maintain->On employee record assignment->Tax info ->State Tax

Forms personalization used -

Trigger event -WHEN-NEW-FORM-INSTANCE

Action ->Property Object type-block ,Target object- FEDTAX, property name -UPDATE_ALLOWED, value-FALSE --->this works

Action ->Property Object type-block ,Target object- STATETAX, property name -UPDATE_ALLOWED, value-FALSE --->DOES NOT works

I want all forms opening from master Tax info should be in read only.

Can anyone help.

thanks in advance