I am working with Pro Jsp 2nd Ed examples using Tomcat 4 under Linux.  When 
I run the cart example the cart will not preserve state.  In other words 
the cart will not hold more than one item (each add overwrites the last).  
This type of problem also occurred with the Time Entry example in Chs 3 and 
 4 where the summary will not work.  

Is there a setting in my configuration that I can use to remedy this?