ejb-jar.xml : No valid xml schema or doctype

[srshende]

Hello,
When I deployed my ejb jar file Server responded with some error in ejb-jar.xml . The error is :
" ejb-jar.xml must either obey the right xml schema or define a valid DOCTYPE!"

below is my ejb-jar.xml :
---------------------

<ejb-jar>
Sample file Upload application
<display-name> Activity</display-name>
<enterprise-beans>

<ejb-name>MyActivity</ejb-name>
samplesession.ejb.MyActivityHome
samplesession.ejb.MyActivity
<ejb-class>samplesession.ejb.MyActivityBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>

</enterprise-beans>
<assembly-descriptor>
<container-transaction>

<ejb-name>MyActivity</ejb-name>
<method-name>*</method-name>

<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
---------------------------------

let me know if theres any thing wrong. can any one give me doctype path for ejb-jar.xml file if required.

[claude.glauser]

Try
<?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 >
.......