radio-button - ラジオボタン入力による選択画面の切り替えができない

Question

ラジオボタン入力に基づいて選択画面をトグル（非表示）にしようとしています。しかし、コードは機能していないようです。

" Radio button block

SELECTION-SCREEN BEGIN OF BLOCK search_block WITH FRAME TITLE text-001.
PARAMETER: rad_flt RADIOBUTTON GROUP rgb DEFAULT 'X',
    rad_cus RADIOBUTTON GROUP rgb.
SELECTION-SCREEN END OF BLOCK search_block.


" Selection screen 1

SELECTION-SCREEN BEGIN OF BLOCK flight_block WITH FRAME TITLE text-002.
PARAMETER: carrid TYPE sbook-carrid,
   connid TYPE sbook-connid,
   fldate TYPE sbook-fldate MODIF ID sc1.
SELECTION-SCREEN END OF BLOCK flight_block.

" Selection screen 2

SELECTION-SCREEN BEGIN OF BLOCK customid_block WITH FRAME TITLE text-002.
PARAMETER: customid TYPE sbook-customid MODIF ID sc2.
SELECTION-SCREEN END OF BLOCK customid_block.


AT SELECTION-SCREEN OUTPUT.
*Toggle the selection screens based on radio buttons
LOOP AT SCREEN.
    IF rad_flt = 'X' AND screen-group1 = 'sc2'.
        screen-active = 0.
        MODIFY SCREEN.
    ELSEIF rad_cus = 'X' AND screen-group1 = 'sc1'.
        screen-active = 0.
        MODIFY SCREEN.
    ENDIF.
 ENDLOOP.

画面にはすべての画面が表示されます。デバッガーを使用して問題を追跡できません。