Validar xml com schema xsd

oi galera

to tentando fazer meu xml ser validado com o xsd....e criei uma classe para fazer essa validacao. Minha classe tenta validar, mas sempre da erro apresentando que a tag principal não foi declarada.
E eu gerei o xml pelo netbeans baseado no xsd. E a tag existe.

Segue minha classe de validaçao:

public static void validando(String xml, String xsd) throws ParserConfigurationException, SAXException, IOException
    {
             // Parse an XML document into a DOM tree.
             DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
                         
                       
             Document document = parser.parse(new File(xml));

             // Create a SchemaFactory capable of understanding WXS schemas.
             SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
             //SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.DEFAULT_NS_PREFIX);
             //SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI);

             // Load a WXS schema, represented by a Schema instance.
             String caminho = &quot;F:\\Projetos\\Web Service\\xsd 2.0\\&quot;;
             Source schemaFile = new StreamSource(new File(caminho + &quot;nfse v2 0.xsd&quot;));
             Schema schema = factory.newSchema(schemaFile);

             // Create a Validator object, which can be used to validate
             // an instance document.
             Validator validator = schema.newValidator();

             // Validate the DOM tree.
             validator.validate(new DOMSource(document));

             System.out.println(&quot;XML validado com sucesso&quot;);   

    }

E o erro dado:

Exception in thread &quot;main&quot; org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'CancelarNfseEnvio'.
	at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
	at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
	at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(Unknown Source)
	at org.apache.xerces.jaxp.validation.DOMValidatorHelper.beginNode(Unknown Source)
	at org.apache.xerces.jaxp.validation.DOMValidatorHelper.validate(Unknown Source)
	at org.apache.xerces.jaxp.validation.DOMValidatorHelper.validate(Unknown Source)
	at org.apache.xerces.jaxp.validation.ValidatorImpl.validate(Unknown Source)
	at javax.xml.validation.Validator.validate(Unknown Source)

E o xml gerado de acordo com o xsd:

&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
&lt;CancelarNfseEnvio  xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
   xmlns:ns1='http://www.w3.org/2000/09/xmldsig#'
   xmlns='http://www.abrasf.org.br/nfse.xsd'
   xsi:schemaLocation='http://www.abrasf.org.br/nfse.xsd nfsev20.xsd'&gt;
    &lt;Pedido&gt;
        &lt;InfPedidoCancelamento Id=""&gt;
            &lt;IdentificacaoNfse&gt;
                &lt;Numero&gt;&lt;/Numero&gt;
                &lt;CpfCnpj&gt;
                    &lt;Cpf&gt;&lt;/Cpf&gt;
                &lt;/CpfCnpj&gt;
                &lt;InscricaoMunicipal&gt;&lt;/InscricaoMunicipal&gt;
                &lt;CodigoMunicipio&gt;&lt;/CodigoMunicipio&gt;
            &lt;/IdentificacaoNfse&gt;
            &lt;CodigoCancelamento&gt;&lt;/CodigoCancelamento&gt;
        &lt;/InfPedidoCancelamento&gt;
&lt;/CancelarNfseEnvio&gt;

alguem sabe pq? nao valida de jeito nenhum....como se não tivesse a tag cancelarNfse e na verdade, existe.
:shock: :?:

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