Hello all, 
Am new to EJB and I am stuck with this error when i try to deploy my beans.

I have a TraceBean which is a MessageDrivenBean and when I try to deploy 
this by placing it in the config/mydomain/applications I get this error.

-------------------------
<Sep 12, 2000 7:18:30 PM GMT+05:30> <Error> <J2EE> <Error deploying 
application TraceBean: Could not deploy: 'TraceBean.jar':
        com.iriscube.checkin.TraceBean>
<Sep 12, 2000 7:18:32 PM GMT+05:30> <Warning> <HTTP> <Public ID references 
the old version of Servlet 2.2 DTD. Please, change the public ID in 
web.xml file to "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN".>
<Sep 12, 2000 7:18:42 PM GMT+05:30> <Warning> <HTTP> <Public ID references 
the old version of Servlet 2.2 DTD. Please, change the public ID in 
web.xml file to "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN".>
org.xml.sax.SAXParseException: Element type "caching-descriptor" must be 
declared.
        at weblogic.apache.xerces.framework.XMLParser.reportError
(XMLParser.java:1008)
        at 
weblogic.apache.xerces.validators.common.XMLValidator.reportRecoverableXMLE
rror(XMLValidator.java:1236)
        at 
weblogic.apache.xerces.validators.common.XMLValidator.validateElementAndAtt
ributes(XMLValidator.java:2673)
        at 
weblogic.apache.xerces.validators.common.XMLValidator.callStartElement
(XMLValidator.java:818)

the ejb-jar XML file is 
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise 
JavaBeans 2.0//EN" "http://www.java.sun.com/dtd/ejb-jar_2_0.dtd">

<ejb-jar>

<enterprise-beans>

<message-driven>

<ejb-name>TraceBean</ejb-name>

<ejb-class>com.iriscube.checkin.TraceBean</ejb-class>

<transaction-type>Bean</transaction-type>

<jms-acknowledge-mode>auto-acknowledge</jms-acknowledge-mode>

<message-driven-destination>
<jms-destination-type>javax.jms.Queue</jms-destination-type>
</message-driven-destination>

<security-identity>
<run-as-specified-identity>
<role-name>system</role-name>
</run-as-specified-identity>
</security-identity>

</message-driven>

</enterprise-beans>

</ejb-jar> 


---------------
I have one more session bean the UserSession bean and i get this error for 
the bean during deployment

<Sep 12, 2000 7:18:43 PM GMT+05:30> <Error> <J2EE> <Error deploying 
application UserSession: Could not deploy: 'UserSession.jar'
Possible reasons include:
1. The bean or an interface class has been modified but
   the deployment descriptor has not been updated
2. The database mappings in the deployment descriptor do not
   match the database definition
3. The jar file is not a valid jar file
4. The jar file does not contain a valid bean>

The ejb-jar file is 

<?xml version="1.0"?>

<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise 
JavaBeans 2.0//EN" "http://www.java.sun.com/dtd/ejb-jar_2_0.dtd">

<ejb-jar>

    <enterprise-beans>
      <session>
	<ejb-name>UserSession</ejb-name>
	<home>com.iriscube.checkin.UserSessionHome</home>
	<remote>com.iriscube.checkin.UserSession</remote>
	<ejb-class>com.iriscube.checkin.UserSessionBean</ejb-class>
	<session-type>Stateful</session-type>
	<transaction-type>Container</transaction-type>
      </session>
    </enterprise-beans>

    <assembly-descriptor>
      <container-transaction>
	<method>
	  <ejb-name>UserSession</ejb-name>
	  <method-intf>Remote</method-intf>
	  <method-name>*</method-name>
	</method>
	<trans-attribute>Required</trans-attribute>
      </container-transaction>
    </assembly-descriptor>
  </ejb-jar>
------------------------------------------------------------

Can anyone guide me what the error could be, and how to go about it.


Advanced Thanks
Usha