problem in deploying web service using jax-ws

[khaled_jawaher]

i am using tomcat7.0,jdk1.6,and i downloaded the jax-wsri jar files.
first i created folder named ws in webapps in tomcat folder.
then in ws folder i created WEB-INF folder and META-INF.and in WEB-INF i created folder classes&folder lib.

then i created the web service class as follows

package hello;
import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.jws.*;
import javax.xml.ws.Endpoint;
@WebService public class HelloWorld{
@WebMethod public String Hello(){
String s;
s="Hello";
return s;
}
public static void main(String[] args) {

		Endpoint.publish("http://localhost:8080/ws/hello",
				new HelloWorld());

	}
}

i compiled it and saved HelloWorld.class in:webapps\ws\WEB-INF/classes\HelloWorld.class

after that i created web.xml that is

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee                         
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"     
version="2.4">   
<listener>
<listener-class> 
com.sun.xml.ws.transport.http.servlet.WSServletContextListener
</listener-class>
</listener>
<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>
HelloWorld
</servlet-class>
</servlet>
<servlet-mapping>     
<servlet-name>Hello</servlet-name>
<url-pattern>/HelloWorld</url-pattern>
</servlet-mapping>
</web-app>

and saved it in webapps/ws/WEB-INF

then i created sun-jaxws

<?xml version="1.0" encoding="UTF-8"?> <endpoints version="2.0" xmlns="http://java.sun.com/xml/ns/jax-ws/ri/runtime">   <endpoint implementation="hello.HelloWorld" name="HelloWorld" url-pattern="/HelloWorld"/> </endpoints>

and save it in webapps/ws/WEB-INF

i moved also all jar files from jaxws-ri to webapps\ws\WEB-INF\lib directory

after that i run tomcat and browse through the address http://localhost:8080/HelloWorld/
but i am receiving the requested resource (/HelloWorld/) is not available.
i don't know if anybody can help
regards