Are you using Firefox? If so, you don't need to disable adblock or your firewall. Any sites that require you to do that should be tossed off of a cliff.
As the site name implies, it's an ad based link shortener/redirector. If you have the Noscript add-on installed, you need to temporarily allow scripts for adfoc dot us and googleapis dot com - and nothing else. Then you'll be able to get the 5 second countdown timer in the upper right of the screen. Just click on "skip" after it counts down and you'll get the Mirrorcreator links.
Other than the intrusive nature of that site, I don't have a problem getting the actual file links, so if you still have problems, let me know which links you want me to de-spam.