TXMLDocument at runtime

Помогите убить ерор.

TXMLDocument *src;
String src_fileName;

src_fileName = "src.xml";
src = new TXMLDocument(src_fileName);
_di_IXMLNode root;

src->DOMVendor = GetDOMVendor("MSXML");
src->LoadFromFile(src_fileName);
src->Active = true;
root = src->DocumentElement; // error