Wrong component? EJB can't used as web component?

Shit!! Something was wrong! When I deploy my web app into JBoss, it throws me this error:

(MSC service thread 1-2) MSC000001: Failed to start service jboss.deployment.unit."ejbWeb1.war".PARSE: org.jboss.msc.service.StartException in service jboss.deployment.unit."ejbWeb1.war".PARSE: JBAS018733: Failed to process phase PARSE of deployment "ejbWeb1.war"
 at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:127) [jboss-as-server-7.3.4.Final-redhat-1.jar:7.3.4.Final-redhat-1]
 at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
 at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.4.GA-redhat-1.jar:1.0.4.GA-redhat-1]
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_79]
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_79]
 at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_79]
Caused by: java.lang.RuntimeException: JBAS018043: org.huahsin.ejb.Authentication has the wrong component type, it cannot be used as a web component
 at org.jboss.as.web.deployment.component.WebComponentProcessor.deploy(WebComponentProcessor.java:120)
 at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:120) [jboss-as-server-7.3.4.Final-redhat-1.jar:7.3.4.Final-redhat-1]
 ... 5 more

The clue is org.huahsin.ejb.Authentication can not be used as web component. Ok! Fine. What is the root cause of this? I'm gonna find out this...

I got an EJB code as stated below:

package org.huahsin;

@Remote
public interface AuthenticationRemote {
    public int status();
}

package org.huahsin;

@Stateless(name="authenticate")
@LocalBean
public class Authentication implements AuthenticationRemote {
    @Override
    public int status() {
        return 1234;
    }
}

This code was located in a standalone EJB project. And then I have another set of code which will accessing the EJB code:

package org.huahsin;

@WebServlet("/authentication")
public class Authentication extends HttpServlet {

 @EJB
 private AuthenticationRemote authenticationRemote;

 public Authentication() {
  super();
 }

 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
  int result = authenticationRemote.status();
  ...
  ...
 }
 
 @Override
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
  
 }
}

Yet, this is another web app project. So, to make these two projects work together, I did the following configuration on the web project:

1. Reference the EJB project in Project References.
2. Add EJB project in Web Deployment Assembly.

With the code flat on the plane, I think I have spotted the error. Notice that both web and EJB project having the same class name (Authentication) and package name (org.huahsin), this is where the error came from. Thus, rework on the code by placing org.huahsin.ejb for EJB project and org.huahsin.web for web project will solve this issue.