It could be the Country you live in. Some Countries block zippyshare from what I hear. Perhaps another member here can re-up them for you.
The U.K. has government authorities making laws that prevent online piracy and online privacy. It all started in the early 2000's. So, it is not exactly strange anymore. Zippyshare has been known for online piracy. Hence, Zippyshare's website has been blocked from U.K. internet servers.
When I go on the Zippyshare website, this message is seen: "File has expired and does not exist anymore on this server" The link is useless.