Problem trying to change tab

Hello,

I have an application for the Nokia Series 60 with two tabs in the graphical user interface. When I try to change the tab pressing the right arrow key, the name of the tab changes but the application doesn't show the components of the new screen, maintaining the previos screen with its menu options.

Debugging I have found that the problem is in the DoActiveL method when it calls the constructor, which is never executed.

Anyone knows what can it happen? I have the problem in the 6600 but not in the 6630.

void CMoviPolisSistemaView::DoActivateL(const TVwsViewId& /*aPrevViewId*/,
TUid /*aCustomMessageId*/,
const TDesC8& /*aCustomMessage*/)
{
 if (!iViewSistemaContainer)
 {
 iViewSistemaContainer = new(ELeave)
 CMoviPolisSistemaViewContainer;
 iViewSistemaContainer->SetMopParent(this);
 TRect tr = ClientRect();   
 iViewSistemaContainer->ConstructL(tr);  //Non executed
 ...
 }
}
Thanks