IE8，BHO call createElement and appendChild functions, but no effect!

Question

Hello,

        It run successfully on the internet explorer 6.0 and 7.0. but on the internet explorer 8.0, the functions have been called successfully, but it have no effect!

        Is that because I do not have a digital signature?

 

Code：

CComPtr<IHTMLElement> pBodyHTMLElement;
 hr=pHTMLDocument2->get_body(&pBodyHTMLElement);
 if (FAILED(hr))
 {
  return -1;
 }


 CComQIPtr<IHTMLDOMNode, &IID_IHTMLDOMNode>  spHTMLDOMNodeBody(pBodyHTMLElement);


 CComQIPtr<IHTMLElement>  spElemTemp;
 hr=pHTMLDocument2->createElement(L"div", &spElemTemp);
 if (FAILED(hr))
 {
  return -1;
 }


 hr = spElemTemp->setAttribute(L"id", variant_t(L"n_div"));
 if (FAILED(hr))
 {
  return -1;
 }


 hr = spElemTemp->put_innerHTML(L"aaaaaaaaaaa");
 if (FAILED(hr))
 {
  return -1;
 }


 CComQIPtr<IHTMLDOMNode>  spHTMLDOMNodeTemp(spElemTemp);
 CComQIPtr<IHTMLDOMNode>  spHTMLDOMNode;
 hr=spHTMLDOMNodeBody->appendChild(spHTMLDOMNodeTemp, &spHTMLDOMNode);
 if (FAILED(hr))
 {
  return -1;
 }