hi , i have started with "beginning JSP web development" and got stuck on chapter 7 about classes. when i try to compile a code i get "cannot resolve symbol"

i followed the instruction on the book on how to install java & tomcat. I also followed the instruction on how to set the environmental variable including the CLASSPATH. I'm using windows 2000 NT. I currently have the classpath set as (under system variable):

        CLASSPATH c:\jakarta-tomcat-4.0\common\lib\servlet.jar;.

I have the files: Book.java, Book.class, TechnicalBook.java & ChildrenBook.java under the following directory:

c:\jakarta-tomcat-4.0\webapps\begjsp-ch07\WEB- INF\classes\com\wrox\library

I'm trying to compile TechicalBook and ChildrenBook and in the code it extends Book. I was able to compile Book.java successfully. Any help will be appreciated. Thanks.