Sometimes Internet Explorer could interrupt your connection when it's too slow.
Please try to download from another location.
Here is a list of all available links where you can download:
http://www.myibay.com/download/ (and click "Download" button).
BetaNews.com and Download.com are the best usually.
Sometimes file could be corrupted when you do right-click - "save as". Try to do left-click on a link.