RTC CURRPAGE.EDITABLE problem

Dear Experts,

I am developing a page "edit or readonly" function in NAV2017. But, i found that eventhough i have declared CURRPAGE.EDITABLE(varEdit) at OnOpenPage when varEdit is FALSE, the page still can be edit by the "Edit List" in the ribbon.

What else should I do? I want to have the result that those "New", "Edit List", "Delete" in ribbon will be hidden like when i straightly make the page property editable to "No".

Thanks in advance!!