license info - to keep or not

[Maya Muchnik]

Hi,

Maybe somebody from developers can answer to me. Do I need to keep the
Apache license in the above of my code if I have modified that code. For
example, I am using Craig. M. LogonAction.java and have modified it a
lot. Do I need to keep the license including some record from cvs? Or I
need to put a note:

 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."

Thanks,

Maya