Unable to Update to Windows 8.1

I am trying to update to the latest Windows 8.1 Preview. I clicked on the Get the Update link and it says, "Unable to Connect". I am really frustrated about this update. And some time it shows the update is not available. I checked on my internet connection and it was working fine. I searched on the web for some solutions and found out more complains about this 8.1 update. What do I need to continue with the update?
