Setup can't run with Wordpress redirect

the12stepbuddhist

I have a self-hosted installation on my Wordpress site. When trying to run the zenphoto setup at this url:

http://the12stepbuddhist.com/zenphoto/zp-core/setup.php

I get this error:

Redirect Loop

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

The browser has stopped trying to retrieve the requested item. The site is redirecting the request in a way that will never complete.

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jlang

Not quite the same, but I get an identical page when I log in to this support forum with Firefox. The login seems to go through fine though so when I press the back button and refresh, I'm then logged in.