Cannot get custom server-side (not-equal-to) validation message to client-side UI

Tried all that i know to get the message to front but it is always a static output. Is it a bug?
Any insight anyone?

UI validation msg
UI validation msg823×336 11.1 KB

the static result on client side.
SA validation codeview
SA validation codeview962×228 12.8 KB

SA validation
SA validation1703×312 20 KB

Community Page
Last updated: