Dear Stephen,
Apologies for the delayed response. It was a holiday in India today, hence the delay.
We are in the process of finding the issue.
On the initial check, it look like Server Configuration, PHP version issue, or htaccess issue.
If you could send FTP details as well, that would really be helpful. (mail it to contact[at]eleopard.in )
Also, please let me know what web-hosting service are you using? (GoDaddy, BlueHost etc.)