about ListBox selection.......

i have created the ListBox but i cann't nevigate the items using arrow key. my code is given below:



.rss
RESOURCE LISTBOX r_akntalist_single_1 {
   array_id = r_akntalist_item_single1;
   flags = EAknListBoxSelectionList;
   //flags = EAknListBoxMarkableList;
}
RESOURCE ARRAY r_akntalist_item_single1 {
   items =
   {
      LBUF { txt = "1\tItem1"; },
      LBUF { txt = "2\tItem2"; },
      LBUF { txt = "3\tItem3"; },
      LBUF { txt = "4\tItem4";}
   };     
}


mycontainer.cpp
void mycontainer::ConstructL(const TRect& aRect)
   {
   CreateWindowL();
   TInt resourceId = R_AKNTALIST_SINGLE_1;
   iListBox = new(ELeave)CAknSingleNumberStyleListBox();
   iListBox->SetContainerWindowL( *this);
   TResourceReader reader;
   CEikonEnv::Static()->CreateResourceReaderLC(reader, resourceId);
   iListBox->ConstructFromResourceL( reader );
   CleanupStack::PopAndDestroy(); // resource stuffs.   
   SizeChanged();
   iListBox->ActivateL();
   DrawNow();
   SetRect(aRect);
   ActivateL();
   }

TInt mycontainer::CountComponentControls() const
   {
   return 1;
   }

CCoeControl* mycontainer::ComponentControl(TInt aIndex) const
   {
   switch(aIndex)
   {
      case 0: return iListBox;
      default: return NULL;
   }
   }

void mycontainer::SizeChanged()
   {
   iListBox->SetExtent (TPoint(0,0), iListBox->MinimumSize());   
   }


it is displaying the Items and select the Item1. i want to go Item2 or Item3........ but i cann't

i am beginner. i am just learning. pls show some ways to do this

thanks

bashar