From EZP Knowledge Base

Well now, this is probably one of the most common emails we get. Some of these suggestions may seem a bit simple, but it's easy to overlook the little stuff in the heat of the moment, so don't laugh!

• The number one cause of this is forgetting to change your DNS with your domain name registrar! You should have received an email when you signed up that contained the nameservers your sites should use. You must enter these nameservers exactly correct with your domain name registrar and then wait for the new settings to propagate. Propagation is generally quick BUT can take up to 24 - 48 hours.
• Ensure you have uploaded your files to the correct directory! The correct folder would be "www" or "public_html", both of which are under your FTP root folder.
• Ensure your index page is named any of the following: index.htm, index.html, index.php. Please note that it should be in lowercase characters.
• Check that your account is paid in full.
  
• Ensure your domain name resolves correctly from your PC. Checking this is easy, simply click the start menu, then run, then type in "command", then type in " nslookup yourdomain.com" and hit enter. This should show what IP yourdomain.com is resolving too. If it doesn't match the IP in your welcome email, you can try to clear your dns cache by again clicking start menu, then run, then type in "command", then type in "ipconfig -flushdns" and hit enter. After this, perform your nslookup again. If it is still returning an incorrect result and you're certain the nameserver settings are correct at your domain name registrar, perhaps you should contact your ISP technical support department. Or you could attempt to use a different DNS resolver.
  
• Ensure you can ping the domain. This is easily accomplished in windows by clicking the start menu, then run, then type in "command", then type in "ping yourdomain.com" and hit enter. If you can't ping the domain, the rest of the internet is working and you have gone through all of the above steps, submit a support ticket and we'll help you out right away!