Q&A Plugin won't save settings - kepp getting spinning 'wait' icons

Hi - I have tried everything to get this plugin-in to work on my site, but to no avail! It works on other test sites but it will not work as a Wordpress subdirectory in the site http://www.floodaustralia.net.
The current WP subdirectory I am testing is FAQ (i.e. http://www.floodaustralia.net/FAQ) - it is a brand new WP install, default theme, new SQL DB, but still I get those spinning 'wait' icons in the Settings part of Questions. I can tick boxes for the capabiltiies and save, but when I return to the same place all the options return to unticked. Please refer to attachment.

I would appreciate early feedback. Thank-you

Regards,
Greg Umbers