I tried to config an oracle datasource, but i get the following error message. What could be the problem?

org.jboss.deployment.DeploymentException: Error in jbosscmp-jdbc.xml : datasource-mapping Oracle9i not found
at org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityMetaData.(JDBCEntityMetaData.java:487)
...


These are my config files:

standardjbosscmp-jdbc.xml

<jbosscmp-jdbc>
 <defaults>
 <datasource>java:/OracleDS</datasource>
 <datasource-mapping>Oracle9i</datasource-mapping>
 </defaults>
</jbosscmp-jdbc>

<jaws>
 <datasource>java:/OracleDS</datasource>
 <type-mapping>Oracle9i</type-mapping>
</jaws>

<datasources>
 <local-tx-datasource>
 <jndi-name>OracleDS</jndi-name>
 <connection-url>jdbc:oracle:thin:@localhost:1521:mysid</connection-url>
 <driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
 <user-name>x</user-name>
 <password>y</password>
 <!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the pool -->
 <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name>
 <!-- Checks the Oracle error codes and messages for fatal errors -->
 <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-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 - the OracleValidConnectionChecker is prefered
 <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
 -->

 <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
 <metadata>
 <type-mapping>Oracle9i</type-mapping>
 </metadata>
 </local-tx-datasource>

</datasources>