Registration List - I keep getting this notice ( Server Error in '/' Application.)

When I go to the registration list to download, I get a error sign saying:"Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly. "   Could some one tell me how to  get my Product information to work so that I may download the things I've payed for PLEASE !!