Extensions - new page Action is not visible. Why?

Hello everybody,
any idea why new page Action is not visible? I have created extension (.navx), install and publish it. All other changes work OK, but new Action is not visible. Why?

Content of DELTA.TXT file:

OBJECT Codeunit 50900 Event Subscribers to Extension
{
  OBJECT-PROPERTIES
  {
    Date=25.05.17;
    Time=10:57:14;
    Modified=Yes;
    Version List=Test Extensions-3;
  }
  PROPERTIES
  {
    OnRun=BEGIN
          END;

  }
  CODE
  {

    [EventSubscriber(Page,5201,OnAfterActionEvent,MyTest)]
    PROCEDURE OnActionTest@1(VAR Rec@1000 : Record 5200);
    BEGIN
      MESSAGE('Subsriber is running ...');
      SLEEP(10);
      PAGE.RUNMODAL(5200);
    END;

    BEGIN
    END.
  }
}

OBJECT Modification "Employee List"(Page 5201)
{
  OBJECT-PROPERTIES
  {
    Date=25.05.17;
    Time=11:22:37;
    Modified=Yes;
    Version List=NAVW110.0,Test Extensions-3;
  }
  PROPERTIES
  {
    Target="Employee List"(Page 5201);
  }
  CHANGES
  {
    { Insertion         ;InsertAfter=Action 33;
                         ChangedElements=ActionCollection
                         {
                           { 3       ;2   ;Action    ;
                                           Name=MyTest;
                                           CaptionML=ENU=MyTest;
                                           RunObject=Page 5200;
                                           Promoted=Yes;
                                           PromotedIsBig=Yes;
                                           PromotedCategory=New }
                         }
                          }
    { PropertyModification;
                         Property=Version List;
                         OriginalValue=NAVW110.0;
                         ModifiedValue=NAVW110.0,Test Extensions-3 }
  }
  CODE
  {

    BEGIN
    END.
  }
}