Thank you for your post, and I apologize for the late reply.
I'm a little confused. You can log in as a guest but get "Database not available", while other users can log in and access the file. Are those other users using a guest account? Are you accessing the database through Open Remote? More information is needed to help my understanding.
TSGal, thanks but it's been so long I can't remember how I solved my problem, but it is solved.