I'm running Omeka at itranscribe.com.au and would like to install Mediawiki for a transcription project for Queensland State Archives. The problem is, when I run index.php from a browser, I get a 404 page error. All the mediawiki files are in directory itranscribe.com.au/wikimedia/w and I can access other files within the directory from a browser (e.g. image files). I've tried the Mediawiki email list for help, to no avail. Can anyone here please help?