Unable to update XML Attributes using XMLLITE c++

Question

I'm trying to update a XML document NODE attributes using the XMLLITE reader and writer , but i couldn't. When i try to add new attribute then the writer is adding.

My Question is Is it possible to update the Existing XML Node attribute values using XMLLITE?

<parent>
    <child Name="AAA">Yes
    </child>
</parent>

I want to update the above XML Node Attribute of Name

<parent>
    <child Name="BBB">Yes
    </child>
</parent>

XMLLIte c++ Code

//if the element is price, then discount price by 25%   
                                    if (wcscmp(pQName, L"child") == 0)
                                    {
                                        inPrice = TRUE;
                                        /*if (FAILED(hr = pWriter->WriteAttributeString(NULL, L"test", NULL, L"TEST")))
                                        {
                                            wprintf(L"Error writing WriteAttributeString, error is %08.8lx", hr);
                                            return -1;
                                        }*/

                                        /*if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
                                        {
                                            wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
                                            return -1;
                                        }*/

                                        //if (FAILED(hr = pReader->MoveToAttributeByName(L"Name", NULL)))
                                        if (FAILED(hr = pReader->MoveToFirstAttribute()))
                                        {
                                            wprintf(L"Error Moving to Attribute, error is %08.8lx", hr);
                                        }

                                        LPCWSTR  AttributeValue = NULL ; 

                                        if (FAILED(hr = pReader->GetValue(&AttributeValue, NULL)))
                                        {
                                            wprintf(L"Error Moving to Attribute, error is %08.8lx", hr);
                                        }

                                        if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
                                        {
                                            wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
                                            return -1;
                                        }

                                        inPrice = TRUE;
                                        if (FAILED(hr = pWriter->WriteAttributeString(NULL, L"Name", NULL, L"BBB")))                                            
                                        {
                                        wprintf(L"Error writing WriteAttributeString, error is %08.8lx", hr);
                                        return -1;
                                        }


                                    }
                                    else
                                    {
                                        inPrice = FALSE;
                                        if (FAILED(hr = pWriter->WriteNodeShallow(pReader, FALSE)))
                                        {
                                            wprintf(L"Error writing WriteNodeShallow, error is %08.8lx", hr);
                                            return -1;
                                        }

                                    }

I tried doing that as you have mentioned, I tried to set the value of the attribute , but it not setting the value for the existing attribute , but if i tried to add a new attribute then its adding the attribute.

When i tried to loop the through node list , the node type never comes to the case XmlNodeType_Attribute: I 'M NOT SURE WHY?

Please give me your suggestions,

Thanks karthik