Hi,
Add the following code lines.
// get a reference to the node the repeating table is bound to
IXMLDOMNode row = thisXDocument.DOM.selectSingleNode("my:repeatingtable");
// make a copy of the node by cloning it
row = row.cloneNode(true);
// set the new values of the row's fields
row.selectSingleNode("my:field1").text = "new row field1";
row.selectSingleNode("my:field2").text = "new row field2";
row.selectSingleNode("my:field3").text = Ttaxie;
// append the cloned row to the parent node
IXMLDOMNode parent = thisXDocument.DOM.selectSingleNode("/my:myFields");
parent.appendChild(row);
Note: The above code is in C#.