@WebServlet annotation with Tomcat 7

In my application, I had a servlet which was defined like this in the web.xml:

<servlet>
    <display-name>Notification Servlet</display-name>
    <servlet-name>NotificationServlet</servlet-name>
    <servlet-class>com.XXX.servlet.NotificationServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>NotificationServlet</servlet-name>
    <url-pattern>/notification/*</url-pattern>
</servlet-mapping>

After moving to use Tomcat 7, I would like to use the @WebServlet annotation that will do the job.
Here is the way I did it:

@WebServlet( name="NotificationServlet", displayName="Notification Servlet", urlPatterns = {"/notification"}, loadOnStartup=1)
public class NotificationServlet extends HttpServlet {

And it does not work. Could someone please tell me what I did wrong?