Every time I click on "Download" for an attachment I've received in Zoho Mail, I get the following error:

Internet Explorer cannot download filename.doc from mail.zoho.com.

Internet Explorer was not able to open this Internet site.  The requested site is either unavailable or cannot be found.  Please try again later.

This happens for any file type and any size file.  I am using IE7 and Windows XP.  Help appreciated... thanks!