I'm having the same problem with the PodPress plugin. I've used it a couple of times, the first time... I somehow fluked out and it worked fine. Plays like a dream.
Can't load wp-config.php (located in "/homepages/0/d164063511/htdocs/wp-content"). You must put this plugin in your plugins directory ("/wordpress/wp-content/plugins/").
What does this mean? The plugin is installed in the correct directory and the only thing that these locations could be from, I think would be from the settings?