Cannot create resource instance

Question

Hi to get a pool connection I use a universal pool connection(ucp.jar). I did this:
In the server.xml of tomcat i put these:
<Resource
     name="onconsultas"
     auth="Container"
     description ="Pool for onconsultas"
     type="oracle.jdbc.pool.OracleConnectionPoolDataSource"               
  />In the context.xml of tomcat i put these:
<Context path="/onconsultas" docBase="onconsultas" debug="0" reloadable="true">
     <ResourceParams name = "onconsultas">
          <parameter>
               <name>driverClassName</name>
               <value>oracle.jdbc.driver.OracleDriver</value>
          </parameter>
          <parameter>
               <name>factory</name>
               <value>oracle.jdbc.pool.OracleDataSourceFactory</value>
          </parameter>
          <parameter>
               <name>logAbandoned</name>
               <value>true</value>
          </parameter>
          <parameter>
               <name>removeAbandoned</name>
               <value>true</value>
          </parameter>
          <parameter>
               <name>removeAbandonedTimeout</name>
               <value>60</value>
          </parameter>
          <parameter>
               <name>url</name>
               <value>jdbc:oracle:thin:@198.198.111.170:1521:asesoras</value>
          </parameter>
          <parameter>
               <name>user</name>
               <value>sisope</value>
          </parameter>
          <parameter>
               <name>password</name>
               <value>sisope</value>
          </parameter>
     </ResourceParams>  
</Context>In the web.xml of tomcat( i also tried in the web.xml of mi aplication):
resource-ref>
        <description>Description pool</description>
        <res-ref-name>onconsultas</res-ref-name>
        <res-type>oracle.jdbc.pool.OracleConnectionPoolDataSource</res-type>
        <res-auth>Container</res-auth>
</resource-ref>Finally in mi class I code:
Context ctx = null;
Context initCtx = new InitialContext();
  ctx = (Context) initCtx.lookup("java:comp/env");
  OracleConnectionPoolDataSource dataSource = ( OracleConnectionPoolDataSource) ctx.lookup("/onconsultas");in the line of the dataSource is the error and said:
javax.naming.NamingException: Cannot create resource instance
What is wrong? i don't get it

Answer 1

I forgot: I 'm using tomcat 6.0.18 that came with the netbeans 6.9 and I `m not using servlets. Almost all the code is in the jsp.