Got a "Critical Update" message so I proceeded to do the update.

Don't know what I'm doing wrong, first I backed up the files (of course), downloaded the upgrade zip file to my PC, unzipped it, navigated through FTP to the server, copied over the files replacing as needed ... but when I went back to the site, the "Critical Update" message was still there and the DNN site shows that I'm still running 7.00.05.  There was NO "upgrade page" or anything like that, nothing that shows that the upgrade ever happened even though the new files are there on the server.

... any ideas out there as to what's going on?