Forum Thread edits wont save
 

Hi,

I am running vbulletin 4.0.4 forum only on my site. ( non suite ).

Code:
http://www.FPSKiwi.co.nz
Whenever I / another member goes to edit a thread, the editor loads up fine. However when "Save" is clicked the thread will just continuously show the loading symbol and never properly save.

Any idea why this is?

Thanks