Hi Girl-Friend,
I believe Mike meant to say that you'll need to look in the Authentication table. Therein will be a row with AuthenticationType = "DNN" (probably the first row). Set the IsEnabled bit in this row to True, restart DNN, and you should be good to go!
Alternatively, you can just execute this query against your DNN database:
UPDATE
Authentication SET IsEnabled = 1 WHERE AuthenticationType = 'DNN'If you have a database prefix, you'll need to include it before the "Authentication" (eg; DNN_Authentication).
Hope this helps!
Brandon