hibernate hbm2java使用的问题
本人hibernate的初学者，在使用hbm2Java生成.java文件是，出现如下错误，请高手帮助解决一下！谢谢！

2007-4-16   18:12:58   net.sf.hibernate.tool.hbm2java.CodeGenerator$1   error
严重:   Error   parsing   XML:   file:/D:/hibernate-extensions-2.1.3/tools/src/hiber/create.hbm.xml(4)
org.xml.sax.SAXParseException:   The   system   identifier   must   begin   with   either   a   single   or   double   quote   character.
                at   org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Un
known   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.XMLScanner.reportFatalError(Unknown   Source)
                at   org.apache.xerces.impl.XMLScanner.scanExternalID(Unknown   Source)
                at   org.apache.xerces.impl.XMLDocumentScannerImpl.scanDoctypeDecl(Unknown
  Source)
                at   org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispat
ch(Unknown   Source)
                at   org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Un
known   Source)
                at   org.apache.xerces.parsers.XML11Configuration.parse(Unknown   Source)
                at   org.apache.xerces.parsers.DTDConfiguration.parse(Unknown   Source)
                at   org.apache.xerces.parsers.XMLParser.parse(Unknown   Source)
                at   org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown   Source)
                at   org.jdom.input.SAXBuilder.build(SAXBuilder.java:354)
                at   org.jdom.input.SAXBuilder.build(SAXBuilder.java:707)
                at   org.jdom.input.SAXBuilder.build(SAXBuilder.java:689)
                at   net.sf.hibernate.tool.hbm2java.CodeGenerator.main(CodeGenerator.java:
100)
org.jdom.JDOMException:   Error   on   line   4   of   document   file:/D:/hibernate-extension
s-2.1.3/tools/src/hiber/CreditRecQueryInfoHi.hbm.xml:   The   system   identifier   must
  begin   with   either   a   single   or   double   quote   character.
                at   org.jdom.input.SAXBuilder.build(SAXBuilder.java:363)
                at   org.jdom.input.SAXBuilder.build(SAXBuil