Those are the correct connectors for monitoring Exchange, but there are also some additional steps to perform on the Exhange server itself to make everything work correctly:
Enable auditing in Exchange 2007 using Microsoft's Exchange Management console. For additional information, see Managing Exchange Server 2007 Log Files (Part 1).
Note: To audit authentication information in Exchange 2007, you have to audit all authentication information. For example, a logon to the user's primary mailbox and a mailbox other than their own are audited by the same properties.
Let me know if you need any additional information.
Thank you very much phil3. You helped me a great favor.