Error when accessing Entity from JSP

Question

I'm trying to develop an application in Jboss AS.
I have an Entity Class named Users and a stateful session named LoginActionBean which has the following method:
  public Users checkUser(String t1,String t2){
         Users test = (Users) em.createNamedQuery("Users.login").setParameter("userUsername",t1).setParameter("userPwd",t2).getSingleResult();
            return test;
    }In my jsp file, I try to do the following:
Users a;
public void jspInit() {
    try {
        InitialContext ic = new InitialContext();
        bci = (LoginActionLocal) ic.lookup("deytera_pasxa/LoginActionBean/local");
    } catch (Exception ex) {
        System.out.println("Error:"+
                ex.getMessage());
try {
    s2 = request.getParameter("username");
    s3 = request.getParameter("password");
    if (s2 != null && s3 != null) {
            a = bci.checkUser(s2,s3);
.....I get no compilation error but when I try to run it I get:
20:28:08,650 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
java.lang.NoSuchMethodError: ejb.LoginActionLocal.checkUser(Ljava/lang/String;Ljava/lang/String;)Lejb/Users;
        at org.apache.jsp.isLogged_jsp._jspService(isLogged_jsp.java:90)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
        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:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
        at java.lang.Thread.run(Thread.java:595)at the moment checkUser() is called. If I change the method's return type to let's say boolean and change the code, it works perfectly fine!
I'm stuck here for 3 hours, any help much appreciated.
Edited by: SyMpToM on May 5, 2008 11:03 AM
Edited by: SyMpToM on May 5, 2008 11:04 AM

Answer 1

The form action event is in a javascript function. I am sorry I mentioned that I am accessing this servlet from JSP. Actually,this servlet is accessed from an HTML document.
The following is the javascript code:
<script language="javascript">
function lfnCallNext()
     alert("In the function");
     frmMain.method="POST";
     frmMain.action="/TestServlet";
     frmMain.hidChoice.value="GetList";
     frmMain.submit();
</script>
And this function is called from an hyperlink as follows:
Work with Employee Database
Thanks,