Badi for tcode IW22

hi All,

i want to implement badi for iw22..

requirement is like that...

if we select any notification number and when click on display ..

then we there is "Status" field.Suppose if status field id set to any perticular Status (Ex. ATCO or OSNO or OSTS )

then all tabs for that notification number should be Disabled.

Please Suggest Needful..

One point i need to add i found one Badi "DFPS_TST", i think in this i have to change, but when i going to implemt then sap doens not allow me to do that...

List of BAdi's for this T.code

INST_AUTHORITY_CHECK

GOS_SRV_SELECT

NOTIF_ACTIONBOX

NOTIF_ACTIONBOX

DFPS_TST

BADI_MATN1

IWO1_WKCTR_CHANGE

Which badi shold i need to change??? or is there any other way???