Servlet session objects shariing same session objects? Help!

Hi all,
          Is it possible for two different HttpSessions to share the same session objects.
          We have a java class that we store in the session. This class calls a stateless Session EJB to do quoting for an insurance policy. It seems that two different clients are sharing the same instance of the EJB because they are each modifying the other's quotes.
          I have checked the session id for each client and have found that they are different. I then changed the EJB to be stateful but I received the same results.
          I'm not sure where to go from here.
          Any help would be greatly appreciated.
          Thanks in advance.
          Greg

The session object is declared through a useBean-directive and has session-scope. We are using WLS sp 4

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