Error on binding context attribute dinamically

This loop get each element of the node and select one element:

for( int i=0; i< wdContext.nodeS_Requisicaocompra_1().size(); i++ ){
               wdContext.nodeS_Requisicaocompra_1().setLeadSelection( i );
               elem = wdContext.currentS_Requisicaocompra_1Element();
}

If I display the element value it happen with sucessfully:

               textView = (IWDTextView) view.createElement(IWDTextView.class);
               textView.setText( elem.getTxz01() );
               itens.addChild(textView);	

But I need to bind the values and I doesn´t work, witch is the correct way to bind ?

                textView = (IWDTextView) view.createElement(IWDTextView.class);
                textView.bindText(  wdContext.nodeS_Requisicaocompra_1().getNodeInfo().getAttribute( "Txz01" ) );
                itens.addChild(textView);