EJB 3 jboss 4.2 error - Programmers Heaven

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EJB 3 jboss 4.2 error

Hello World :),

i'm trying to learn ejb3. i found this tutorial for the classic "hello world" (...jairrillo.com/blog/2008/04/25/example-of-ejb3-session-bean-using-eclipse-europa-and-jboss/). I'm not using eclipse europa, i`m using eclipse helios. Anyway in eclipse europa i get the same errors.

At the beggining i used jboss 6 but it didn't let me deploy the ear. Now i'm using jboss4.2 just like the tutorial says, i can deploy the ear file but when i click the link in the servlet i get the folowing error:

[code]
11:44:00,801 ERROR [[TestServlet]] Servlet.service() for servlet TestServlet threw exceptionjava.lang.ClassCastException: $Proxy72 cannot be cast to lesson.stateless.HelloWorld at lesson.servlets.TestServlet.doGet(TestServlet.java:21) at javax.servlet.http.HttpServlet.service(HttpServlet.java:690) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:662)
[/code]
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