To find out if your database connection to the LDAP server is working, ping the connection cache.
Right-click the connection cache, 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 ldap.jar, providerutil.jar, jconn2.jar (the jConnect driver), and jndi.jar (JNDI 1.2)
You are using JDK 1.3.
Pinging the connection cache