As the above user stated, I believe you may have uploaded your files into the wrong part of your site, or have uploaded blank files to your site.
When you login to FTP, there are many files in your root directory (/home/yourusername/) These files are for the systems used by x10 (including cPanel and others). Anything that you put in the folder /public_html/ (/home/yourusername/public_html) is accessible by anyone who is visiting your site.
I hope that helped!
Neil Hanlon