In Resin 4.0.4

I follow this step :
http://www.caucho.com/resin/doc/resin-ejb.xtp#Hello, World

public interface PersonDao {
 //... methods...
}

@Stateless
public class PersonServiceImpl implements PersonService , Serializable {
  @Inject
  private PersonDao personDao;
...
}

The dao can be injected to Servlet WITHOUT a @Stateless annotation ,
but when add @Stateless , it throws :

com.caucho.config.ConfigException: foo.HelloServlet.personService:
javax.enterprise.inject.UnsatisfiedResolutionException: Can't find a bean
for 'interface foo.PersonService' because no beans implementing that class
have been registered with the injection manager InjectManager[web-app:
http://test.smallufo.com/testapp-1].
      at com.caucho.config.ConfigException.create(ConfigException.java:102)
      at com.caucho.config.ConfigException.create(ConfigException.java:125)
      at
com.caucho.config.inject.InjectionTargetImpl$FieldInjectProgram.inject(InjectionTargetImpl.java:809)
      at
com.caucho.config.inject.InjectionTargetImpl.inject(InjectionTargetImpl.java:266)
      at
com.caucho.server.dispatch.ServletConfigImpl.createServletImpl(ServletConfigImpl.java:1260)
      at
com.caucho.server.dispatch.ServletConfigImpl.createServlet(ServletConfigImpl.java:1142)
      at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:98)
      at
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:183)
      at
com.caucho.server.webapp.AccessLogFilterChain.doFilter(AccessLogFilterChain.java:103)
      at
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:286)
      at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:780)
      at
com.caucho.server.connection.TcpConnection.dispatchRequest(TcpConnection.java:600)
      at
com.caucho.server.connection.TcpConnection.handleRequestsImpl(TcpConnection.java:566)
      at
com.caucho.server.connection.TcpConnection.handleRequests(TcpConnection.java:519)
      at
com.caucho.server.connection.TcpConnection$AcceptTask.doTask(TcpConnection.java:1100)
      at
com.caucho.server.connection.TcpConnection$ConnectionReadTask.runThread(TcpConnection.java:1037)
      at
com.caucho.server.connection.TcpConnection$AcceptTask.run(TcpConnection.java:1068)
      at com.caucho.util.ThreadPool$PoolThread.runTasks(ThreadPool.java:901)
      at com.caucho.util.ThreadPool$PoolThread.run(ThreadPool.java:866)
Caused by: javax.enterprise.inject.UnsatisfiedResolutionException: Can't
find a bean for 'interface foo.PersonService' because no beans implementing
that class have been registered with the injection manager
InjectManager[web-app:http://test.smallufo.com/testapp-1].
      at
com.caucho.config.inject.InjectManager.unsatisfiedException(InjectManager.java:1389)
      at
com.caucho.config.inject.InjectManager.resolveByInjectionPoint(InjectManager.java:1545)
      at
com.caucho.config.inject.InjectManager.resolveByInjectionPoint(InjectManager.java:1523)
      at
com.caucho.config.inject.InjectManager.getInjectableReference(InjectManager.java:1476)
      at
com.caucho.config.inject.InjectionTargetImpl$FieldInjectProgram.inject(InjectionTargetImpl.java:805)
      ... 16 more
Http[2] HTTP/1.1 500 Internal Server Error
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