Error 404

I have javawebserver2.0 in my system. Just I wrote my first servlet program and stored it in public_html directory.
My class file location is - ..public_html\prgs\HW.class
I try to run it in my browser, I got file not found - 404 error.
Tried with URL : "http://localhost:8080/servlet/prgs/HW"
Can anyone help me to solve this problem? I could run other examples in my browser. I think this problem is not uncommon.
Thanks in Advance.
JKP.

You have place the servlet class in javawebserver/servlets directory.
You can access the servlet by giving the URL as
http://localhost:8080/servlet/filename
Eg:- http://Neeraj:8080/servlet/Stock

Thank you Neeraj. It works.
JKP.