I am facing a problem with an LDAP operation. I want to dynamically add a member to an LDAP group when selected by the user from GUI / browser. I paste the code below which works perfectly well when I run it in a Test class (using com.sun.jndi.ldap.LdapCtxFactory) . But, when I package it in my build, deploy on websphere app server 7.0 (using com.ibm.websphere.naming.WsnInitialContextFactory), and invoke this method according to user's selection, then I get the error below. I wonder what's wrong I am doing. Doesn't WAS provide implementation of ldap connection factory? I also tried deploying on WAS with the sun's ldap which otherwise works on the Test class, but I am getting the same exception as below. I'd appreciate if anybody can give a clue. Thanks.