HTTP Status 404

I m learning servlet & JSP using Tomcat 4.1 server.

I wrote one simple example and saved it in C:\Tomcat\webapps\ROOT\WEB-inf\classes

and I compiled the file and the .class file is created in the same file structure.

the problem is when I run this servlet using http://localhost:8080/servlet/HelloServlet

page showing HTTP status 404 The requested resource is not available. can any one please suggest what should I do

[453 byte] By [suniania] at [2007-10-3 11:13:22]