Problem deploying ejbs in weblogic

Hi:
I am trying to deploy my ejb.ear file into weblogic 7.0
I have modeled my ejb-jar.xml after the templates provided
with weblogic.
I get the following error:
-------
weblogic.xml.process.XMLParsingException: The content of element type "session" is incomplete, it must match "(description?,display-name?,small-icon?,large-icon ?,ejb-name,home?,remote?,local-home?,local?,ejb-class,session-type,transaction-t ype,env-entry*,ejb-ref*,ejb-local-ref*,security-role-ref*,security-identity?,res
ource-ref*,resource-env-ref*)".
-------
My ebj-jar.xml is as follows. Can anyone tell me what is wrong with it?
Thanks for the help.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>
<ejb-jar>
    <display-name></display-name>
    <enterprise-beans>
        <session>
      <ejb-name>StatelessSession</ejb-name>
      <home>session.ejb.stateless.SampleStatelessHome</home>
      <remote>session.ejb.stateless.SampleStateless</remote>
      <ejb-class>session.ejb.stateless.SampleStatelessBean</ejb-class>
            <session-type>Stateful</session-type>
            <transaction-type>Container</transaction-type>
        </session>
    </enterprise-beans>
    <assembly-descriptor>
        <container-transaction>
            <description>Transaction attributes for 'CustomerIteratorEJB' methods</description>
            <method>
      <ejb-name>StatelessSession</ejb-name>
                <method-name>*</method-name>
            </method>
            <trans-attribute>NotSupported</trans-attribute>
        </container-transaction>
    </assembly-descriptor>
</ejb-jar>

As far as the DTD is concerned, JBuilder says it's just fine.