TIWTreeView - please help

[denville]

W7/64 C++ Builder XE7 (update 1) 32-bit build New IntraWeb Application
Latest IW (.20) brand new license and support update, carefully installed in virgin W7 / XE7 re-installation, unbundle tool used prior to upgrade.
Please see my earlier post just a few back for more info.

I am left with the original TreeView problem - nothing about it seems to work.  This is the code in its entirety...

static TIWTreeViewItem *tnp, *snp;

void __fastcall TIWForm1::IWButton2AsyncClick(TObject *Sender, TStringList *EventParams)
///////////////////////////////////////////////////////////////////////////////////////
{
    tnp = LogTreeView->Items->Add( NULL );
    tnp->Caption = "First Node";

    snp = LogTreeView->Items->Add( tnp );
    snp->Caption = "First Sub Node";

    tnp->Expanded = false;
}

void __fastcall TIWForm1::LogTreeViewTreeItemClick(TObject *Sender, TIWTreeViewItem *ATreeViewItem)
//////////////////////////////////////////////////////////////////////////////////////////////////
{
String us = ATreeViewItem->Caption;

us = us;
}

Just as before, the TV displays expanded with the + and - ineffective, and (double) clicking on one or t'other fails to fire the Click event.  I have tried setting AsyncMode (default True) to both T and F, and setting DoServerSidePlusMinus (default True) set both T and F.  I added the following code with no success:

void __fastcall TIWForm1::LogTreeViewPlusMinus(TObject *aSender, bool aIsPlus)
/////////////////////////////////////////////////////////////////////////////
{
    tnp->Expanded = aIsPlus;
}

Please, what have I missed ?

Denville.