Failed to initialize the ORB - WSAD 5.1.2

[crazyideas]

hi all,
We are trying to implement JUNIT (3.8.1) into our application. Our application has EJBs. The application runs on a WAS 5.1 server. We do our development in WSAD 5.1.2.
In our development environment we wrote a simple test class and tried to run it from the WSAD environment. We added the all the required JARs and fixed the errors one by one.
At present we are stuck with the following error -


javax.naming.NamingException: Failed to initialize the ORB [Root exception is org.omg.CORBA.INITIALIZE: can't instantiate default ORB implementation com.ibm.CORBA.iiop.ORB vmcid: 0x0 minor code: 0 completed: No]
at com.ibm.ws.naming.util.Helpers.getOrb(Helpers.java:265)
at com.ibm.ws.naming.util.WsnInitCtxFactory.getInitialContextInternal(WsnInitCtxFactory.java: 166)
at com.ibm.ws.naming.util.WsnInitCtx.getContext(WsnInitCtx.java:98)
at com.ibm.ws.naming.util.WsnInitCtx.<init>(WsnInitCtx.java:79)
at com.ibm.ws.naming.util.WsnInitCtxFactory.getInitialContext(WsnInitCtxFactory.java:137)
at com.ibm.websphere.naming.WsnInitialContextFactory.getInitialContext(WsnInitialContextFacto ry.java:114)
at com.ibm.ejs.ns.jndi.CNInitialContextFactory.getInitialContext(CNInitialContextFactory.java :68)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:392)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:276)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:167)
Caused by: org.omg.CORBA.INITIALIZE: can't instantiate default ORB implementation com.ibm.CORBA.iiop.ORB vmcid: 0x0 minor code: 0 completed: No
at org.omg.CORBA.ORB.create_impl(ORB.java:297)
at org.omg.CORBA.ORB.init(ORB.java:336)
at com.ibm.ws.orb.GlobalORBFactory.init(GlobalORBFactory.java:77)
at com.ibm.ejs.oa.EJSORBImpl.initializeORB(EJSORBImpl.java:174)
at com.ibm.ejs.oa.EJSClientORBImpl.<init>(EJSClientORBImpl.java:98)
at com.ibm.ejs.oa.EJSClientORBImpl.<init>(EJSClientORBImpl.java:74)
at com.ibm.ejs.oa.EJSORB.init(EJSORB.java:386)
at com.ibm.ws.naming.util.Helpers.getOrb(Helpers.java:260)
... 27 more
Caused by: java.lang.NoClassDefFoundError: com/ibm/jvm/ExtendedSystem
at com.ibm.rmi.util.JDKBridge.setCodebaseProperties(JDKBridge.java:226)
at com.ibm.rmi.util.JDKBridge.<clinit>(JDKBridge.java:205)
at com.ibm.rmi.util.RepositoryId.<clinit>(RepositoryId.java:122)
at com.ibm.rmi.iiop.CDROutputStream.<clinit>(CDROutputStream.java:1077)
at com.ibm.rmi.corba.ORB.<init>(ORB.java:250)
at com.ibm.rmi.iiop.ORB.<init>(ORB.java:166)
at com.ibm.CORBA.iiop.ORB.<init>(ORB.java:521)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:3 9)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImp l.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:308)
at java.lang.Class.newInstance(Class.java:261)
at org.omg.CORBA.ORB.create_impl(ORB.java:295)
... 34 more


We went through a lot of forums and tried everything we found, it still gives the same error. Has anyone encountered this error? If so, please let us know how you got this fixed or even worked around this.

thanks in advance.