COM exeception on website after it is published

private NotesDatabase db = null;

private NotesSession session = null;

private string sessionStatus = null;

public void initialize(string keyword, string notesServer, string notesFile)

    {

        sessionStatus = "connected";

        try

        {

            setSession(new NotesSession());

            session.Initialize(keyword);

            setDb(getSession().GetDatabase(notesServer, notesFile, false));

        }

        catch (Exception e)

        {

            sessionStatus = "Not connected "  + e.ToString();

            setSession(null);

        }

    }