I successfully set up an Omeka site, but once I attempt to install Neatline, everything disappears and I'm left with the below error message. Any idea what I might do to move forward? The instructions on troubleshooting 404 errors seem incomplete. I'm especially interested to know the answers to the "How? Where?" parenthetical regarding creating a php file in recommendation #2.
Error message:
Notice: Use of undefined constant HELPERS - assumed 'HELPERS' in /home/content/36/10494636/html/omeka/plugins/Neatline/plugin.php on line 47
Warning: require_once(HELPERS) [function.require-once]: failed to open stream: No such file or directory in /home/content/36/10494636/html/omeka/plugins/Neatline/plugin.php on line 47
Fatal error: require_once() [function.require]: Failed opening required 'HELPERS' (include_path='/home/content/36/10494636/html/omeka/application/libraries:/home/content/36/10494636/html/omeka/application/models:.:/usr/local/php5_3/lib/php:/home/content/36/10494636/html/omeka/plugins/Neatline/models') in /home/content/36/10494636/html/omeka/plugins/Neatline/plugin.php on line 47