Digester can not parse well in orion server

Introduction :
   
  What is orion server?
   Orion Application Server is a pure java full-featured application-server. It is a server created in order to take care of many of your problems for you. It provides your application with a foundation that is robust, scalable and easy to develop with. It can support EJB 2.0, Servlet 2.3, JSP 1.2, Connector 1.0, JTA 1.0.1, JavaMail 1.2, JAF 1.0, JAXP 1.1, JAAS 1.0, JNDI 1.2, JDBC 2.0, JMS 1.0.2.
  Visit the http://www.orionserver.com/ to get more infomation.
  
  What is crimson
  Crimson is a Java XML parser which supports XML 1.0.(This will be a big problem when you are the one develop your xml with XSD, since XML 1.0 will only support the DTD http://www.w3.org/TR/2000/REC-xml-20001006), but lucky, we found the following sentences:
    The javax.xml.transform package hierarchy of JAXP is not implemented by Crimson. One implementation of javax.xml.transform can be found at Xalan Java 2. It means some new feature can be introduced into your project by the Xalan project(In such way when you invoke the setFeature("http://apache.org/xml/features/validation/schema", true), there will be no SAXNotRecognizedException thrown out.)
  Visit the http://xml.apache.org/crimson/ to get more infomation.  

Problem:
  The problem in my project is  the digester rule cannot be read into my digester object in orion server though it can run very well in Tomcat, JRun, Weblogic and so forth. After failed once and once again, I found the root cause is the crimons, which is the core package of orion.

  Following is what I do to avoid the problem:
  1. Remove the crimson.jar
  2. Remove the xerces.jar
  3. Get the latest xalan.jar and replace the previous one. which can be 
downloaded from http://xml.apache.org/xalan-j/downloads.html
  4. Put the xmlParserAPIs.jar, xercesImpl.jar and xml-api.jar into the folder. which can be
downloaded from http://www.apache.org/dist/xml/xerces-j/

 I wish this could be found and help other guy who works on it, It really drive me crazy in those month. I don't want other people bored by it again.