Make sure you aren't using a download manager e.g.; Getright, etc., and also make sure you have enabled in your browser Cookies, JavaScript, and Referrer. If it keeps failing to download in one browser try another one, e.g.; Internet Explorer, Firefox, etc.
Do you remember what settings you changed? I keep getting the server not found error and page can't be found errors on both crystalxp.net and rapidshare.