Sorry I was just takeing a spabe in the dark. Next time you can't access your site go into the command prompt (start/run type cmd) and type
Code:
ping dbforum.x10hosting.com
then type
Then cut and copy the results into here
(to cut and copy in the command prompt right click the tab on your start bar, click properties, when the properties dialog box comes up goto the edit options and click quick edit. Then click ok, goto the command prompt window highlight everything you want to copy and then right click it. It will be copied to your clipboard and then you could paste it normally here.)
This will help the admins in figureing out if its a DNS issue or not.