Error message by activation of "Global Author Posts Feed"

Greetings together!

I used the plugin for a longer while in my WPMU installation, for maintrance it shut it off, as I wanted to reacrivate it, I got this error message:

Warning: require_once(../wp-load.php): failed to open stream: No such file or directory in /srv/http/ on line 30 Fatal error: require_once(): Failed opening required ‘../wp-load.php’ (include_path=’.:disappointed:usr/share/pear:disappointed:usr/share/php’:wink: in /srv/http/ on line 30

Has anyone an idea what is happening there? Can anyone help me?