'Wheel of death' doesn't appear on custom application

Hi experts.

I'm going through an unusual situation here.

I've developed a custom component (Search view + Search results), and after pressing button 'Search' I was expecting / wishing to see the famous so-called 'wheel of death' animated gif while waiting the search results.

I've been debugging CL_THTMLB_SUBMITINPROGRESS-DO_AT_BEGINNING method, and nothing seems to be wrong there, the programming logic takes expected paths in runtime, though the animated gif is not shown.

Maybe the problem is in my page layout html code, take a look at a simplified version of it, with only the tags structure it has now:

<%@page language="abap" %>
<%@extension name="htmlb" prefix="htmlb" %>
<%@extension name="thtmlb" prefix="thtmlb" %>
<%@extension name="chtmlb" prefix="chtmlb" %>
<%@extension name="xhtmlb" prefix="xhtmlb" %>
<%@extension name="phtmlb" prefix="phtmlb" %>
<%@extension name="bsp" prefix="bsp" %>

<chtmlb:pageType type="SEARCH" >
      <thtmlb:searchFrame > >
        <thtmlb:searchCriteriaFrame>
          <thtmlb:searchArea>
            <thtmlb:searchTagArea>
              <thtmlb:advancedSearch/>
            </thtmlb:searchTagArea>
            <thtmlb:searchSavingArea>
*              Reusing here component CRM_SAVEDSEARCH view Registration
            </thtmlb:searchSavingArea>
            <thtmlb:searchButtonsArea>
              <thtmlb:button/>
            </thtmlb:searchButtonsArea>
          </thtmlb:searchArea>
        </thtmlb:searchCriteriaFrame>
        <thtmlb:searchResultFrame>
          <htmlb:tabStrip id="TabStrip1" >
             <htmlb:tabStripItem id    = "TabItem1">
               <htmlb:page>
                 <chtmlb:configCellerator/>
              </htmlb:page>
             <htmlb:tabStripItem id    = "TabItem2">
               <htmlb:page>
                 <chtmlb:configCellerator/>
              </htmlb:page>
            </htmlb:tabStripItem>
          </htmlb:tabStrip>
        </thtmlb:searchResultFrame>
      </thtmlb:searchFrame>
    </chtmlb:pageType>

Any idea of what is missing / wrong?

Thanks in advance.

FSA