How to create new JNDI Data source in Tomcat 5.0 server

hi ...
I have created new datasource but its giving an error like
ERROR: org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null', cause: null
Nested Exception: java.lang.NullPointerException
please can anybody help me out to solve this bug ?
regards
djshivu

This problem is due to your files server.xml and web.xml. Have you modified them???
I ve the same problem, can you compare these files to mine (you can find my files here: http://forum.java.sun.com/thread.jspa?threadID=635640&tstart=0)

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<servlet-name>JNDIDatabase</servlet-name>
<display-name>JNDIDatabase</display-name>
<description>JNDIDatabase</description>
<servlet-class>com.testing.servlet.jdbc.jndi.JNDIDatabase</servlet-class>
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private Connection conn;
private Statement stmt;
private ResultSet rs;
public void init(ServletConfig config) throws ServletException {
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ted_hankey wrote:
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