Nitesh Varma

I'm trying to look up a Session Bean that I've deployed on WebSphere 6.0 and I'm running into the following problem. I have naming.jar, namingclient.jar and namingserver.jar in the client classpath and obviously the class com.ibm.WsnOptimizedNaming.NamingContextOperations is not in any of these jars. Please could someone point out which jar file is needed.

java.lang.NoClassDefFoundError: com/ibm/WsnOptimizedNaming/NamingContextOperations
at com.ibm.websphere.naming.WsnInitialContextFactory.getInitialContext(WsnInitialContextFactory.java:104)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:674)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:255)
at javax.naming.InitialContext.init(InitialContext.java:231)
at javax.naming.InitialContext.<init>(InitialContext.java:207)
at com.varma.TestHello.main(TestHello.java:15)