Java EE (Java Enterprise Edition) General Discussion

Hi,
Sorry to trouble you all with a newbie Servlet question.

I am using JBoss. My servlet, HelloServlet, prints a simple Hello statement. I create a hello.war file with files

welcome.html
META-INF/Manifest.mf
WEB-INF/web.xml
WEB-INF/classes/HelloServlet.class


web.xml is as -

<?xml version="1.0"?>

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>hello.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/HelloServlet/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>welcome.html</welcome-file>
</welcome-file-list>
</web-app>

I place the hello.war in the jboss/server/default/deploy directory. JBoss starts up fine saying that the war file has been deployed.
In my browser, I type
http://localhost:8080/hello/welcome.html
This works fine.

However when I do
http://localhost:8080/hello/HelloServlet

I get
"javax.servlet.ServletException: Wrapper cannot find servlet class hello.HelloServlet or a class it depends on"
and so on.
I have been following the SAMS Teach yourself EJB book.

Any help would be MUCH appreciated.

DG