Referencing elements "higher up"

Oracle EBS 11i 5.6.3
Sample XML:

<ROWSET>
 <ROW>
  <TRANSFER_ID>100129</TRANSFER_ID>
        <LINE_ROW>
            <LINE_ROW_ROW>
               <ACK_HEADER_ID>10086</ACK_HEADER_ID>
           </LINE_ROW_ROW>
        </LINE_ROW>
 </ROW>
 </ROWSET>

Sample RTF:

<?for-each:ROW?>
   Trans ID: <?TRANSFER_ID?>
     <?for-each:LINE_ROW?>
       Ack Header ID: <?ACK_HEADER_ID?>
       Trans ID: <?TRANSFER_ID?>
    <?end for-each?>
<?end for-each?>

No matter which notation I use, I can't seem to get Trans ID to appear. I've tried with <?TRANSFER_ID?>, <?/ROW/TRANSFER_ID?>, <?/ROWSET/ROW/TRANSFER_ID?>. The last attempt produced data, but only for the first iteration of the node (it copied the rest down).