Java - Problema imposible

Hola estimados amigos :

Tengo este proble no puedo detectar como ni porqué se produce...

Agradecido desde ya...

Karlos
(Error de consola de WAS 4)
[3/22/06 10:16:42:224 CLT] 19827cac WebGroup X Servlet Error: ERROR: Cannot sendRedirect. Response already committed. location = [../xx/xx.jsp?areatelefono=02&numerotelefono=2320018&TipoISP=TIE&descisp=TIE&mensajeMac=00amp;codRespuesta=0a|f|0a|f|&buttonCliente=1&buttonVenta=1&mensajeWar=0&blockAreaNum=1]: java.lang.IllegalStateException: ERROR: Cannot sendRedirect. Response already committed. location = [../xx/xx.jsp?areatelefono=02&numerotelefono=xxxx&TipoISP=TIE&descisp=TIE&mensajeMacttonCliente=x&]
at com.ibm.servlet.engine.webapp.WebAppDispatcherResponse.sendRedirect(WebAppDispatcherResponse.java(Compiled Code))
at com.telefonica_chile.bts.servlets.FactibilidadServlet.doPost(FactibilidadServlet.java(Compiled Code))
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java(Compiled Code))
at com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServlet.java(Compiled Code))
at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java(Compiled Code))
at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java(Inlined Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java(Compiled Code))
at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java(Compiled Code))
at com.ibm.servlet.engine.srt.WebAppInvoker.doForward(WebAppInvoker.java(Compiled Code))
at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java(Compiled Code))
at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java(Compiled Code))
at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java(Compiled Code))
at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java(Compiled Code))
at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java(Compiled Code))
at com.ibm.servlet.engine.http11.HttpConnection.handleRequest(HttpConnection.java(Compiled Code))
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java(Compiled Code))
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java(Compiled Code))
at com.ibm.ws.util.CachedThread.run(ThreadPool.java:144)

Revisa bien el Stack... estas terminando 2 veces el request
commited.location figura 2 veces con dos direcciones distintas.
El response solo se puede commitear una sola vez.

Response already committed. location = [../xx/xx.jsp?areatelefono=02&numerotelefono=2320018&TipoISP=TIE&descisp=TIE&mensajeMac=00amp;codRespuesta=0a|f|0a|f|&buttonCliente=1&buttonVenta=1&mensajeWar=0&blockAreaNum=1]: java.lang.IllegalStateException: ERROR: Cannot sendRedirect. Response already committed. location = [../xx/xx.jsp?areatelefono=02&numerotelefono=xxxx&TipoISP=TIE&descisp=TIE&mensajeMacttonCliente=x&]

Muchas gracias.....por tu colaboracion...