I lost/can't access the homepage of my site. (Catch Mustang Pro)

Two days ago I had my client contact me saying his site was down. http://www.allautoaircompressors.com.au I found this message when I attempted to open the site. The page isn't redirecting properly - Firefox has detected that the server is redirecting the request for this address in a way that will never complete. This message is also appearing on my clients browser too. Would appreciate greatly if anyone can offer me a solution. I can access the admin. I have many WP sites, many using Catch Mustang Pro but this is the only site that has encountered the problem. Thanks in advance Jeffemupark