Schema importer extension and target type ReadXml method ????

[devboycpp]

A new Schema importer extension was created to return a Forum object instead of Book object when invoking Select method of a web service.When running a asp.net web page that invokes the Select method of the web service(which returns Book object) the WriteXml method of Book class(original type returned by web service method) is invoked and the object Serializes itself there and then ReadXml method of Forum class(new type registered by schema importer) is invoked but the XmlReader parameter does not contain actual data :

void IXmlSerializable.ReadXml(XmlReader reader)
{
this.title = reader.GetAttribute("title") + " by " + reader.GetAttribute("author");
this.bookID = reader.GetAttribute("bookID");
}

reader.GetAttribute("title") and reader.GetAttribute("author") return null and finally the Forum object returned from Select method of the web service contains empty fields ? Am I missing something in implementing this Schema importer extension?