status 404 with jndi

[indu iyengar]

Hi all,

when I try to add this code in web.xml in

<resource-ref>
    <res-ref-name>myDS</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
  </resource-ref>>

the result is

HTTP Status 404 - /TestStudent/TestJNDI

by commenting the above code in we.xml, 404 status is not coming
am using jboss 5.0
entry in mysql-ds.xml in Jboss is :::

<datasources>
  <local-tx-datasource>
    <jndi-name>myDS</jndi-name>
    <connection-url>jdbc:mysql:///test</connection-url>
    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <user-name>root</user-name>
    <password>admin</password>
    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
    <!-- should only be used on drivers after 3.22.1 with "ping" support
    <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>
    -->
    <!-- sql to call when connection is created
    <new-connection-sql>some arbitrary sql</new-connection-sql>
      -->
    <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers
    <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
      -->

    <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
    <metadata>
       <type-mapping>mySQL</type-mapping>
    </metadata>
  </local-tx-datasource>
</datasources>

code in TestJNDI class :::

InitialContext context = new InitialContext();
                    System.out.println("**********");
DataSource ds = (DataSource)context.lookup("java:/myDS");
                   System.out.println("$$$$$$$$$");

where is the mistake am doing ? please help me to sort out !