Hi,
Make sure that your servlet has mapping in your deployment descriptor (web.xml) as in:
<servlet>
<servlet-name>My Servlet</servlet-name>
<servlet-class>xxx.servlets.MyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>My Servlet</servlet-name>
<url-pattern>/servlet/myServlet</url-pattern>
</servlet-mapping>
With this mapping, you can invoke your servlet as:
http://localhost:8080/servlet/myServlet HTH.