Java.io.IOException: Did not receive successful HTTP response: status code = 404

Pessoal,

Quando tento me logar em uma aplicação JSF que roda no JBoss 4.2, aparece a seguinte mensagem de erro :

[code]
12:05:03,689 WARN [RequestProcessor] Unhandled Exception thrown: class org.springframework.remoting.RemoteAccessException
12:05:03,691 ERROR [STDERR] javax.servlet.ServletException: org.springframework.remoting.RemoteAccessException: Could not access HTTP invoker remote service at [http://localhost:8080/sipac/remoting/memorandoEletronicoService]; nested exception is java.io.IOException: Did not receive successful HTTP response: status code = 404, status message = [/sipac/remoting/memorandoEletronicoService]
12:05:03,691 ERROR [STDERR] at org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:516)
12:05:03,691 ERROR [STDERR] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:423)
12:05:03,691 ERROR [STDERR] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
12:05:03,691 ERROR [STDERR] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1158)
12:05:03,691 ERROR [STDERR] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
12:05:03,691 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
12:05:03,691 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
12:05:03,691 ERROR [STDERR] at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:74)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
12:05:03,691 ERROR [STDERR] at br.ufrn.arq.web.ViewFilter.doFilter(ViewFilter.java:237)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
12:05:03,691 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
12:05:03,691 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
12:05:03,691 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
12:05:03,692 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
12:05:03,692 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
12:05:03,692 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
12:05:03,692 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
12:05:03,692 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
12:05:03,692 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
12:05:03,692 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
12:05:03,692 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
12:05:03,692 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
12:05:03,692 ERROR [STDERR] at java.lang.Thread.run(Thread.java:662)
12:05:03,692 ERROR [STDERR] Caused by: org.springframework.remoting.RemoteAccessException: Could not access HTTP invoker remote service at [http://localhost:8080/sipac/remoting/memorandoEletronicoService]; nested exception is java.io.IOException: Did not receive successful HTTP response: status code = 404, status message = [/sipac/remoting/memorandoEletronicoService]
[/coce]
Alguém pode me dar alguma idéia do que pode estar acontecendo ?
Agradece,

Max Carvalho