Branding function stopped working

Hello,

I built a site using Sleek Photo. All worked great - except suddenly I cannot access the Branding section of the Theme Options.
It seems to try to retrieve the Branding functiion.php - but nothing happens. The file is there- I checked it on Chrome, Opera and Firefox.

Here is the site address:
http://websitewag.com/gofairwayauto/

Best
Aaron