DBtaglibs problem connecting via JNDI

[Gustavo]

I´m using Tomcat 4.0 and I would like to use DBTaglibs in my JSPs. I´ve tried with a test page and it works when I use url, driver, user and password attributes in the connection tag.   But I would like to connect via JNDI and then it fails:       NullPointerException in apache.org....ConnectionTag.doStartTag     I´ve defined an entry in my server.xml file for the JNDI lookup and it seems to be correct.   Any ideas about what can be hapenning?   Thanks in advance,   Gustavo Mateos