database configuration with Resin 3.0.6

I am trying to configure AS/400 DB2 database driver (available via JTOPEN v4.2) 
for Resin 3.0.6:

I added following entries for setting up datasource to be used by Servlets and 
EJBs in web.xml:

<database>
        <jndi-name>jdbc/AS400DB</jndi-name>
        <driver>
                
<type>com.ibm.as400.access.AS400JDBCConnectionPoolDataSource</type>
                <init-param serverName=".."/>
                <init-param naming="system"/>                                   
                <init-param user="..."/>        
                <init-param password="..."/>    
        </driver>
 </database>

But I don't think resin/jtopen driver likes this entry - I am still prompted to 
manually enter System, User and Password information when the application tries 
to connect with the database. 

I was wondering if any one has done this before.. I used resource-ref tag 
successfully with Resin 2.1.8 for specifying data source, but seems things have 
changed in Resin 3.0.

TIA,