BOPF Value validation mesasges are appearing as pop up instead in message container

Hello Experts and Gurus,

I'm trying an BOPF value validation (while create/update) for an particular field so that corresponding error message is displayed in message container as shown in the sap help documentation when i press ENTER key or click into another input field.

Query1: Im getting error POP UP message only after SAVE, But i need to pop up error on pressing ENTER key or click into another input field.

Query2 : I should get error messages as shown in documentation and not as error POP UP message

(I have used the same validation code as suggested in documentation and used in /BOBF/IF_FRW_VALIDATION~EXECUTE method)

I need messages to appear as in image1 and instead im getting POP UP error message as in image2.

Please help me guys, I'm stuck for a long time.
Thanks in advance and would appreciate for help.