Yeah, I changed it back to the original URL. I'll change it to http://deltaregion.x10.mx now then.
Also how would I delete my site from .x10 and from Google?
When you change the domain, the server needs some time (maybe a couple of hours, maybe a bit more) to update its file mapping domain name to account files.
Every time you change the domain, the process starts over.
That "Server Error" page is a placekeeper until the server can update itself. You just have to be patient.
You can add the old domain as an add-on.
Then, use htaccess to redirect requests for the old URLs to the new ones with a 301 Permanent Redirect . I believe Google will understand that and eventually just have the new URLs.