I have the error  javax.naming.NameNotFoundException: prova not bound

my mysql-ds.xml:

<?xml version="1.0" encoding="UTF-8"?>
<datasources>



          <local-tx-datasource>

                    <jndi-name>prova</jndi-name>

                    <connection-url>jdbc:mysql://localhost:3306/prova</connection-url>

                    <driver-class>com.mysql.jdbc.Driver</driver-class>

                    <user-name>root</user-name>

                    <password>root</password>

                    <!-- 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>

    --> 



                    <metadata>

                                        <type-mapping>mySQL</type-mapping>

                    </metadata>

          </local-tx-datasource>

</datasources>

"prova" is in the  java: namespace but not in the Global JNDI Namespace

java: Namespace

   [.....]
  +- prova (class: org.jboss.resource.adapter.jdbc.WrapperDataSource)
  +- timedCacheFactory (class: javax.naming.Context)

I'm using jboss-5.0.1.GA