Tomcat Http Status 500 - error

Ok.  I am running Tomcat and I have a jsp page calling a servlet.  When I submit the form contained in the jsp page, I get the following error:

The server encountered an internal error () that prevented it from fulfilling this request.

javax.servlet.ServletException: Wrapper cannot find servlet class Login or a class it depends on
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:880)
      at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:658)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
      at java.lang.Thread.run(Thread.java:536)


root cause

java.lang.ClassNotFoundException: Login
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1428)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1274)
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:874)
      at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:658)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
      at java.lang.Thread.run(Thread.java:536)



Here is the important part of the jsp file:

...

<BR><FORM ACTION="http://myDomain.com/MyApp/servlet/webstudent.Login" METHOD=POST>
<TABLE>
<TR>
        <TD>StudentID:</TD>
        <TD><INPUT TYPE=TEXT NAME=StudentID></TD>
</TR>
<TR>
        <TD>Password:</TD>
        <TD><INPUT TYPE=PASSWORD NAME=Password></TD>
</TR>
<TR>
        <TD ALIGN=RIGHT COLSPAN=2>
        <INPUT TYPE=SUBMIT VALUE=Login></TD>



...


and here is the servlet:

 public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
        {
                HttpSession session = request.getSession(true);         //Create a session if one doesn't exist
                session.setAttribute("loggedIn", new String("true"));

                String StudentID = request.getParameter("StudentID");
                String Password = request.getParameter("Password");
                String FirstName;
                String LastName;
                String Course;
                String Semester;
                String trans = "0";
                session.setAttribute("trans",trans);
                try
                {
                        Context initCtx = new InitialContext();
                        Context envCtx = (Context)initCtx.lookup("java:comp/env");
                        DataSource ds = (DataSource)envCtx.lookup("jdbc/PrototypeBooks");
                        Connection con = ds.getConnection();
                        Statement s = con.createStatement();
                        String sql = "SELECT * FROM Students WHERE StudentID='" + StudentID + "' AND Password='" + Password + "'";
                        ResultSet rs = s.executeQuery(sql);
                        if (rs.next())
                        {
                                session.setAttribute("loggedIn","true");
                                FirstName = rs.getString("FirstName");
                                LastName = rs.getString("LastName");
                                Course = rs.getString("Course");
                                Semester = rs.getString("Semester");

                                Student myStudent = new Student(StudentID,LastName,FirstName,Course,Semester);
                                session.setAttribute("myStudent",myStudent);
                        }
                        rs.close();
                                s.close();
                        con.close();
                }
                catch(Exception ex)
                {
                        System.out.println(ex.toString());
                }

            
            if((String) session.getAttribute("loggedIn") == "true")
                {
                        System.out.println("The login was executed flawlessly");
                        response.sendRedirect("http://myDomain.com/jsp/choose.jsp");
                }
                else
                {
                        String error = "error";
                        session.setAttribute("error",error);
                        response.sendRedirect("http://myDomain.com/jsp/Login.jsp");
                }

        }



Any help would be appreciated.... WITH POINTS ;)