title: Not able to toggle selection screens based on radio button input
body: <p>I am trying to toggle(hide) the selection screens based on radio button input. But the code seems not working.</p>
  
  <pre><code>" 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.
  </code></pre>
  
  <p>The screen displays all the screens. Not able to track the issue using debugger.</p>