I moved a site from GoDaddy to (resold) Hostgator a number of weeks ago - de413.org. Have made changes since then. No problems.
All was fine until yesterday when I removed the install from GoDaddy (files and database). Now when I go to http://de413.org/wp-admin, all it does is load the homepage of the site.
Wp-config file seems right - pointing to the right database, username, etc.
Real head scratcher.