I had this problem after set-up. I did something and it worked fine for awhile. Now I am getting the cyclic log-in to the admin, view a page, click update, and then I am returned to the log-in page. No updates ever occur.
What are the solutions and are there any permanent ones. I don't have this problem with any other scripts. The Plogger page is at http://www.vintageradio.com/gallery.