Java Programming

Hello,
I'm working on GNU/Linux and I need of Accessibility for Java Applet. I'm using ORCA screen reader, the latest JDK (java-6-sun) and I'm trying to install the Java Access Bridge for GNOME (java-access-bridge-1.24.2), but something does not work properly; After the installation, if I start a demo Java application, for example, java -jar $JDK_HOME/demo/jfc/Notepad/Notepad.jar, it shows the following error message:


13-ott-2009 15.57.21 com.sun.corba.se.impl.interceptors.PIHandlerImpl peekClientRequestInfoImplStack
AVVERTENZA: "IOP00710817: (INTERNAL) Assertion failed: client request info stack is null"
org.omg.CORBA.INTERNAL: vmcid: SUN minor code: 817 completed: No
at com.sun.corba.se.impl.logging.InterceptorsSystemException.clientInfoStackNull(InterceptorsSystemException.java:701)
at com.sun.corba.se.impl.logging.InterceptorsSystemException.clientInfoStackNull(InterceptorsSystemException.java:723)
at com.sun.corba.se.impl.interceptors.PIHandlerImpl.peekClientRequestInfoImplStack(PIHandlerImpl.java:735)
at com.sun.corba.se.impl.interceptors.PIHandlerImpl.invokeClientPIEndingPoint(PIHandlerImpl.java:386)
at com.sun.corba.se.impl.encoding.BufferManagerWriteStream.overflow(BufferManagerWriteStream.java:56)
at com.sun.corba.se.impl.encoding.CDROutputStream_1_2.grow(CDROutputStream_1_2.java:211)
at com.sun.corba.se.impl.encoding.CDROutputStream_1_2.alignAndReserve(CDROutputStream_1_2.java:182)
at com.sun.corba.se.impl.encoding.CDROutputStream_1_0.internalWriteOctetArray(CDROutputStream_1_0.java:547)
at com.sun.corba.se.impl.encoding.CDROutputStream_1_0.write_octet_array(CDROutputStream_1_0.java:567)
at com.sun.corba.se.impl.encoding.CDROutputStream.write_octet_array(CDROutputStream.java:169)
at com.sun.corba.se.spi.servicecontext.UnknownServiceContext.write(UnknownServiceContext.java:43)
at com.sun.corba.se.spi.servicecontext.ServiceContexts.writeMapEntry(ServiceContexts.java:322)
at com.sun.corba.se.spi.servicecontext.ServiceContexts.writeServiceContextsInOrder(ServiceContexts.java:283)
at com.sun.corba.se.spi.servicecontext.ServiceContexts.write(ServiceContexts.java:247)
at com.sun.corba.se.impl.protocol.giopmsgheaders.ReplyMessage_1_2.write(ReplyMessage_1_2.java:175)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.createResponseHelper(CorbaMessageMediatorImpl.java:2201)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.createResponseHelper(CorbaMessageMediatorImpl.java:2164)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.createSystemExceptionResponse(CorbaMessageMediatorImpl.java:2089)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1873)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1882)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleThrowableDuringServerDispatch(CorbaMessageMediatorImpl.java:1823)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1548)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:922)
at com.sun.corba.se.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:181)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:694)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.dispatch(SocketOrChannelConnectionImpl.java:451)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.doWork(SocketOrChannelConnectionImpl.java:1213)
at com.sun.corba.se.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:471)
at com.sun.corba.se.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:500)

What can I do?
How can I obtain the correct installation of Java Access Bridge working with GNOME?

Thanks
MTR