Sorry! I was pretty vague in my explanation.
When I was in the Mailbeez Facebook mod, I was clicking on "Send Test Mail", putting in the test email address, submitting the request and instead of being sent to a viable page within my admin, I was getting a 404 page. At the end of the web address of the 404 page, a "zenid=564321326546531321" was being added.
I (finally) figured out that the number after the zen id was a session token which led me to turn off the "Recreate Session ID" in my admin>config>sessions.
I hope that it is easier to understand.

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