BoderIcons not shown

Hi Expert,

For some reason, bordericons biSystemMenu, biMinimize, biMaximize are not shown through objectinspector settings not the fsMDIChild's method:

procedure Proj.ShowSearchForm;
begin
   FrmSearch := TFrmSearch.Create(Self);
   FrmSearch.Init(m_Container);
   FrmSearch.Height := 500;
   FrmSearch.Width := 400;
   FrmSearch.Left := (Screen.Width div 2)-(FrmSearch.Width div 2);
   FrmSearch.Top := (Screen.Height div 2)-(FrmSearch.Height div 2);
   FrmSearch.BorderIcons := [biSystemMenu, biMinimize, biMaximize];
   FrmSearch.Show;
end;

Any idea's?

Thanks!