To find out if your database connection is working, ping the data source.
In the Management Console, select the data source, right-click, and select Ping.
If the server does not respond or an error occurs, verify that:
The CLASSPATH and BOOTCLASSPATH specify the correct locations for the providerutil.jar, jconn2.jar (the jConnect driver), and jndi.jar (JNDI 1.2)
You are using JDK 1.4 or JDK 1.5.
Pinging the data source