Delete Cache = Server Error

Using the Delete Cache button on the admin bar on the live version of a website I am working on for a client results in a 500 Server Error page instead of deleting the cache. http://www.mitch-money.com/wp-admin/index.php?action=delcachepage&path=%2Fwp-admin%2Foptions-general.php%3Fpage%3Dwpsupercache%26tab%3Deasy&_wpnonce=a7261a2f8c is what I am getting

It seems to work fine on my local server though.

http://wordpress.org/extend/plugins/wp-super-cache/