Try re-uploading all files & folders from a fresh download of WordPress.
I just did that today. The file transfer appears to be complete because the size of each of the files is the same. I wish I had noted the size of the files before I replaced them with the fresh download from WordPress.
Talking to Register.com, they told me that I was missing my index.php file. However, there is an index file. I can not find a way to see the extension to make sure it is php. However, it the same thing on my computer as on the server.
Any more ideas. I am still checking everything I can think of.
Thanks.