Java EE (Java Enterprise Edition) General Discussion

I have to handle some session variables instantiated after a bean elaboration in my app. I declare them with JSTL in this way:

<c:set var="code" value="${bean.value}" scope="session"/>

I have difficulties when I have to use these session vars, I don't understand what is the correct way to call them with JSTL. Now I use simply (in the next pages) this code:

<c:out value="${code}"/>

but the value is in many cases wrong, it not corresponds to the value I expect. Thanks for the help.