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Struts 1.3, Tomcat 5.5.12, MySQL 5.0.37 issue

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I get the following error "javax.naming.NamingException: Cannot create resource instance" at the line "DataSource ds = (DataSource)envContext.lookup("jdbc/mydb");" in my action class.

I am trying to connect to MySQL database using JNDI. the document that I am referring to resolve the issue is: http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html

the configuration of the system is: Tomcat 5.5.12 Struts 1.3 MySQL Server version: 5.0.37-community-nt MySQL Community Edition (GPL) MYSQL connector to connect frm java code mysql-connector-java-5.0.8-bin.jar (I have downloaded the connector from http://dev.mysql.com/downloads/connector/j/5.0.html ) The code to connect in the action class is

The complete error stack is

This is my server.xml

This is the web.xml

Kindly let me know what is going wrong. Thanks a million in advance.
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