Every time I try to install Adobe Digital Editions I get an error message part way through the installation process that reads "there was an error opening this document. There was a Macintosh Suatem error(-1409)". I have uninstalled previous installations of ADE while I was using OS10.4.11prior to attempting to reinstal. I do not have any ebooks on my computer. I did try to download one of the free ebooks from the ADE home wesite but got the same error message. Does anyone know what error - 1409 is, and what I can do to download ADE?