Authenticate LDAP Using INITIAL_CONTEXT_FACTORY

We are trying to authenticate Password Using LDAP by Setting INITIAL_CONTEXT_FACTORY which leads to error Failed instantiate InitialContextFactory

Please find the below code to authenticate using LDAP

Hashtable<String, Object> env = new Hashtable<String, Object>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDILDAP");

// Authenticate as S. User and password "mysecret"
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL,
"cn=S. User, ou=NewHires, o=JNDITutorial");
env.put(Context.SECURITY_CREDENTIALS, "mysecret");

// Create the initial context
DirContext ctx = new InitialDirContext(env);

The same code works fine in Jboss 4.2