Trouble running Tassie Online Book store EJBs on JBoss

Hi
>  I am trying to run the Tassie Online Book Store
>  Example. It is on:

http://benmira.free.fr/en/j2ee/sessionEJB.htm
>
>  While I successfully compiled the Search (plus the
>  other 2), BookDetails( plus the other 2). Finally when
>  i come to the Cart set of EJBs, I am able to compile
>  Cart.java, and CartHome.java. But when i try to
>  compile Cartbean.java compilation fails.
>
>  The details are as below:
>
>  C:\classes>javac -classpath
>  C:\jboss\client\jboss-j2ee.jar;. com/brainysoftware/
>  tassie/ejb/CartBean.java
>  com/brainysoftware/tassie/ejb/CartBean.java:35: cannot
>  resolve symbol
>  symbol  : variable cart
>  location: class com.brainysoftware.tassie.ejb.CartBean
>      cart.add(row);
>      ^
>  com/brainysoftware/tassie/ejb/CartBean.java:40: cannot
>  resolve symbol
>  symbol  : variable cart
>  location: class com.brainysoftware.tassie.ejb.CartBean
>      return cart;
>             ^
>  2 errors
>
>  ----------------------

I even tried compiling all the EJB's using javac/*.java. ( offcourse
by setting the classpath).
>
>  Do you have any suggestions as to what is wrong?
>  Perhaps I am missing something really obvious in all
>  my inexperience. Your kind help is highly appreciated.
>
>  sincerely
>  ilango gurusamy
>