OpenSAML user discussion

Hi
I am trying to unmarshall and validate an SAML file using SAML2.0 API. While 
running the below piece of code, I am getting the error. 

 String inCommonMDFile = "templates/SamlResponse.xml";
 try {
  DefaultBootstrap.bootstrap();             
  BasicParserPool ppMgr = new BasicParserPool();
  ppMgr.setNamespaceAware(true);
             
  InputStream in = new ByteArrayInputStream(inCommonMDFile.getBytes());  
Document inCommonMDDoc = ppMgr.parse(in);
  Element metadataRoot = inCommonMDDoc.getDocumentElement();
             
  Schema schema = SAMLSchemaBuilder.getSAML11Schema();  Validator validator = 
schema.newValidator();             
  javax.xml.transform.dom.DOMSource domSrc = new DOMSource(metadataRoot);  
validator.validate(domSrc); 
    
  UnmarshallerFactory unmarshallerFactory = 
Configuration.getUnmarshallerFactory();
  Unmarshaller unmarshaller = 
unmarshallerFactory.getUnmarshaller(metadataRoot);
              
  Response samlResponse = (Response) unmarshaller.unmarshall(metadataRoot);

 } catch (XMLParserException xe) {
             System.out.println("Unable to parse XML file: " + xe);
 catch (ConfigurationException e) {            
   e.printStackTrace();
    } catch (SAXException e) {
         e.printStackTrace();
     } catch (IOException e) {            
         e.printStackTrace();
    } 
  Below are the error details.Please can any one help me out with the issue. 
  Unable to parse XML file: org.opensaml.xml.parse.XMLParserException: 
Invalid XML
  21-Oct-2009 18:37:41 org.opensaml.xml.parse.LoggingErrorHandler fatalError
  SEVERE: XML Parsing Error
  org.xml.sax.SAXParseException: Content is not allowed in prolog.
     at 
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown 
Source)
     at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(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.XMLScanner.reportFatalError(Unknown Source)
     at 
org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown
 Source)
     at 
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown 
Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
     at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
     at 
org.opensaml.xml.parse.BasicParserPool$DocumentBuilderProxy.parse(BasicParserPool.java:607)
     at org.opensaml.xml.parse.BasicParserPool.parse(BasicParserPool.java:210)
     at util.MetadataTest.testInCommonUnmarshall(MetadataTest.java:80)
     at util.MetadataTest.main(MetadataTest.java:124)
 
 Below is the my SAML file,I am using.
 =================SamlResponse.xml================
 <Response IssueInstant="2009-09-04T13:37:33Z" MajorVersion="1" 
MinorVersion="1" ID="1bc6d017-f9bd-4333-a618-a73cd4ea51ac">
 <Status><StatusCode Value="Success"/>
 </Status><Assertion AssertionID="9e39584f-5cbd-4241-9ec7-56e011a2035f" 
IssueInstant="2009-09-04T13:37:33Z" Issuer="Test Issuer" MajorVersion="1" 
MinorVersion="1">
 <Conditions NotBefore="2009-09-04T13:37:33Z" 
NotOnOrAfter="2009-09-04T13:37:38Z"/>
 <AuthenticationStatement AuthenticationInstant="2009-09-04T13:37:33Z" 
AuthenticationMethod="urn:oasis:names:tc:SAML:1.0:am:password">
 <Subject>
 <NameIdentifier 
Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress"></NameIdentifier>
 <SubjectConfirmation/>
 </Subject>
 </AuthenticationStatement>
 </Assertion>
 <Signature xmlns="http://www.w3.org/2000/09/xmldsig#";>
 <SignedInfo>
 <CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
 <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
 <Reference URI="#1bc6d017-f9bd-4333-a618-a73cd4ea51ac">
 <Transforms>
 <Transform 
Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
 <Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
 </Transforms>
 <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
 <DigestValue>0qnKCEgW2h7yX/1UfkngJXGXxPk=</DigestValue>
 </Reference>
 </SignedInfo>
 <SignatureValue>vgefKC1BZXTeNjUEqU1aGvBfn1H.....</SignatureValue>
 <KeyInfo>
 <X509Data>
 <X509Certificate>MIIDPTCCAuegAwIBAgIJAK3Eu7cvYD .........</X509Certificate>
 </X509Data>
 </KeyInfo>
 </Signature>
 </Response>
 =====================
 
 Many Thanks
 Regards,
 Murali